diff --git a/Flow.Launcher/Flow.Launcher.csproj b/Flow.Launcher/Flow.Launcher.csproj
index 1f979cbdf..c1fe421fb 100644
--- a/Flow.Launcher/Flow.Launcher.csproj
+++ b/Flow.Launcher/Flow.Launcher.csproj
@@ -89,7 +89,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="InputSimulator" Version="1.0.4" />
-    <PackageReference Include="Microsoft.Toolkit.Uwp.Notifications" Version="7.1.2" />
+    <PackageReference Include="Microsoft.Toolkit.Uwp.Notifications" Version="7.1.3" />
     <PackageReference Include="ModernWpfUI" Version="0.9.4" />
     <PackageReference Include="NHotkey.Wpf" Version="2.1.0" />
     <PackageReference Include="NuGet.CommandLine" Version="5.7.2">
diff --git a/Flow.Launcher/Languages/en.xaml b/Flow.Launcher/Languages/en.xaml
index 2e3922d06..f393af119 100644
--- a/Flow.Launcher/Languages/en.xaml
+++ b/Flow.Launcher/Languages/en.xaml
@@ -92,6 +92,7 @@
     <system:String x:Key="plugin_query_time">Query time:</system:String>
     <system:String x:Key="plugin_query_version">| Version</system:String>
     <system:String x:Key="plugin_query_web">Website</system:String>
+    <system:String x:Key="plugin_uninstall">Uninstall</system:String>
 
 
     <!--  Setting Plugin Store  -->
diff --git a/Plugins/Flow.Launcher.Plugin.BrowserBookmark/Flow.Launcher.Plugin.BrowserBookmark.csproj b/Plugins/Flow.Launcher.Plugin.BrowserBookmark/Flow.Launcher.Plugin.BrowserBookmark.csproj
index 5cff7e2e5..4596acb4c 100644
--- a/Plugins/Flow.Launcher.Plugin.BrowserBookmark/Flow.Launcher.Plugin.BrowserBookmark.csproj
+++ b/Plugins/Flow.Launcher.Plugin.BrowserBookmark/Flow.Launcher.Plugin.BrowserBookmark.csproj
@@ -3,7 +3,6 @@
   <PropertyGroup>
     <OutputType>Library</OutputType>
     <TargetFramework>net6.0-windows</TargetFramework>
-    <RuntimeIdentifier>win-x64</RuntimeIdentifier>
     <UseWPF>true</UseWPF>
     <ProjectGuid>{9B130CC5-14FB-41FF-B310-0A95B6894C37}</ProjectGuid>
     <AppDesignerFolder>Properties</AppDesignerFolder>
@@ -65,4 +64,19 @@
     <Compile Remove="Bookmark.cs" />
   </ItemGroup>
 
+  <Target Name="CopyDLLs" AfterTargets="Build">
+    <Message Text="Executing CopyDLLs task" Importance="High" />
+    <Copy
+      SourceFiles="$(TargetDir)\runtimes\win-x64\native\SQLite.Interop.dll"
+      DestinationFolder="$(TargetDir)\x64" />
+    <Copy
+      SourceFiles="$(TargetDir)\runtimes\win-x86\native\SQLite.Interop.dll"
+      DestinationFolder="$(TargetDir)\x86" />
+  </Target>
+
+  <Target Name="DeleteRuntimesFolder" AfterTargets="CopyDLLs">
+    <Message Text="Deleting runtimes folder" Importance="High" />
+    <RemoveDir Directories="$(TargetDir)\runtimes" />
+  </Target>
+
 </Project>
\ No newline at end of file
diff --git a/Plugins/Flow.Launcher.Plugin.Program/AddProgramSource.xaml b/Plugins/Flow.Launcher.Plugin.Program/AddProgramSource.xaml
index 39d5f8a4e..b1a8744fd 100644
--- a/Plugins/Flow.Launcher.Plugin.Program/AddProgramSource.xaml
+++ b/Plugins/Flow.Launcher.Plugin.Program/AddProgramSource.xaml
@@ -5,11 +5,12 @@
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     Title="{DynamicResource flowlauncher_plugin_program_directory}"
-    Width="530"
+    Width="Auto"
+    Height="276"
     Background="{DynamicResource PopuBGColor}"
     Foreground="{DynamicResource PopupTextColor}"
     ResizeMode="NoResize"
-    SizeToContent="Height"
+    SizeToContent="Width"
     WindowStartupLocation="CenterScreen">
     <WindowChrome.WindowChrome>
         <WindowChrome CaptionHeight="32" ResizeBorderThickness="{x:Static SystemParameters.WindowResizeBorderThickness}" />
@@ -69,9 +70,9 @@
                         TextAlignment="Left"
                         TextWrapping="WrapWithOverflow" />
                 </StackPanel>
-                
-                <StackPanel Margin="0,10,0,0" Orientation="Horizontal">
-                    <Grid Width="470">
+
+                <StackPanel Margin="0,10,10,0" Orientation="Horizontal">
+                    <Grid>
                         <Grid.RowDefinitions>
                             <RowDefinition />
                             <RowDefinition />
@@ -88,21 +89,22 @@
                             VerticalAlignment="Center"
                             FontSize="14"
                             Text="{DynamicResource flowlauncher_plugin_program_directory}" />
-                        <DockPanel 
-                            Grid.Row="0" 
-                            Grid.Column="1" 
+                        <DockPanel
+                            Grid.Row="0"
+                            Grid.Column="1"
                             LastChildFill="True">
                             <Button
-                                Width="70"
-                                HorizontalAlignment="Right"
+                                MinWidth="70"
+                                HorizontalAlignment="Stretch"
                                 Click="BrowseButton_Click"
-                                DockPanel.Dock="Right"
-                                Content="{DynamicResource flowlauncher_plugin_program_browse}" />
+                                Content="{DynamicResource flowlauncher_plugin_program_browse}"
+                                DockPanel.Dock="Right" />
                             <TextBox
                                 Name="Directory"
+                                MinWidth="300"
                                 Margin="10"
-                                VerticalAlignment="Center"
-                                HorizontalAlignment="Stretch" />
+                                HorizontalAlignment="Stretch"
+                                VerticalAlignment="Center" />
                         </DockPanel>
                         <TextBlock
                             Grid.Row="1"
@@ -112,7 +114,8 @@
                             VerticalAlignment="Center"
                             FontSize="14"
                             Text="{DynamicResource flowlauncher_plugin_program_enabled}" />
-                        <CheckBox x:Name="Chkbox"
+                        <CheckBox
+                            x:Name="Chkbox"
                             Grid.Row="1"
                             Grid.Column="1"
                             Margin="10,0"
diff --git a/Plugins/Flow.Launcher.Plugin.Program/Languages/en.xaml b/Plugins/Flow.Launcher.Plugin.Program/Languages/en.xaml
index 1c6c97792..6d9f916e1 100644
--- a/Plugins/Flow.Launcher.Plugin.Program/Languages/en.xaml
+++ b/Plugins/Flow.Launcher.Plugin.Program/Languages/en.xaml
@@ -61,7 +61,7 @@
         Insert file suffixes you want to index. Suffixes should be separated by ';'. (ex>bat;py)
     </system:String>
     <system:String x:Key="flowlauncher_plugin_program_protocol_tooltip">
-        Insert protocols of .url files you want to index. Protocols should be separated by ';'. (ex>ftp;netflix)
+        Insert protocols of .url files you want to index. Protocols should be separated by ';', and should end with "://". (ex>ftp://;mailto://)
     </system:String>
 
     <system:String x:Key="flowlauncher_plugin_program_run_as_different_user">Run As Different User</system:String>
diff --git a/Plugins/Flow.Launcher.Plugin.Program/Main.cs b/Plugins/Flow.Launcher.Plugin.Program/Main.cs
index c212bf8f4..feeb8e78a 100644
--- a/Plugins/Flow.Launcher.Plugin.Program/Main.cs
+++ b/Plugins/Flow.Launcher.Plugin.Program/Main.cs
@@ -102,7 +102,7 @@ namespace Flow.Launcher.Plugin.Program
                 await Task.WhenAll(a, b);
 
             Win32.WatchProgramUpdate(_settings);
-            UWP.WatchPackageChange();
+            _ = UWP.WatchPackageChange();
         }
 
         public static void IndexWin32Programs()
diff --git a/Plugins/Flow.Launcher.Plugin.Program/Programs/UWP.cs b/Plugins/Flow.Launcher.Plugin.Program/Programs/UWP.cs
index 84aa93664..8a731f5b9 100644
--- a/Plugins/Flow.Launcher.Plugin.Program/Programs/UWP.cs
+++ b/Plugins/Flow.Launcher.Plugin.Program/Programs/UWP.cs
@@ -277,7 +277,8 @@ namespace Flow.Launcher.Plugin.Program.Programs
         [Serializable]
         public class Application : IProgram
         {
-            public string UniqueIdentifier { get; set; }
+            private string _uid = string.Empty;
+            public string UniqueIdentifier { get => _uid; set => _uid = value == null ? string.Empty : value.ToLowerInvariant(); }
             public string DisplayName { get; set; }
             public string Description { get; set; }
             public string UserModelId { get; set; }
diff --git a/Plugins/Flow.Launcher.Plugin.Program/Programs/Win32.cs b/Plugins/Flow.Launcher.Plugin.Program/Programs/Win32.cs
index c13b32e80..25ac2b213 100644
--- a/Plugins/Flow.Launcher.Plugin.Program/Programs/Win32.cs
+++ b/Plugins/Flow.Launcher.Plugin.Program/Programs/Win32.cs
@@ -23,10 +23,21 @@ namespace Flow.Launcher.Plugin.Program.Programs
     public class Win32 : IProgram, IEquatable<Win32>
     {
         public string Name { get; set; }
-        public string UniqueIdentifier { get => _uid; set => _uid = value.ToLowerInvariant(); }  // For path comparison
+        public string UniqueIdentifier { get => _uid; set => _uid = value == null ? string.Empty : value.ToLowerInvariant(); }  // For path comparison
         public string IcoPath { get; set; }
+        /// <summary>
+        /// Path of the file. It's the path of .lnk or .url for .lnk and .url.
+        /// </summary>
         public string FullPath { get; set; }
+        /// <summary>
+        /// Path of the excutable for .lnk, or the URL for .url.
+        /// </summary>
         public string LnkResolvedPath { get; set; }
+        /// <summary>
+        /// Path of the actual executable file.
+        /// </summary>
+        public string ExecutablePath => LnkResolvedPath ?? FullPath;
+        public string WorkingDir => Directory.GetParent(ExecutablePath)?.FullName ?? string.Empty;
         public string ParentDirectory { get; set; }
         public string ExecutableName { get; set; }
         public string Description { get; set; }
@@ -97,10 +108,23 @@ namespace Flow.Launcher.Plugin.Program.Programs
                 matchResult.MatchData = new List<int>();
             }
 
+            string subtitle = string.Empty;
+            if (!Main._settings.HideAppsPath)
+            {
+                if (Extension(FullPath) == UrlExtension)
+                {
+                    subtitle = LnkResolvedPath;
+                }
+                else
+                {
+                    subtitle = FullPath;
+                }
+            }
+
             var result = new Result
             {
                 Title = title,
-                SubTitle = Main._settings.HideAppsPath ? string.Empty : LnkResolvedPath ?? FullPath,
+                SubTitle = subtitle,
                 IcoPath = IcoPath,
                 Score = matchResult.Score,
                 TitleHighlightData = matchResult.MatchData,
@@ -116,8 +140,8 @@ namespace Flow.Launcher.Plugin.Program.Programs
 
                     var info = new ProcessStartInfo
                     {
-                        FileName = LnkResolvedPath ?? FullPath,
-                        WorkingDirectory = ParentDirectory,
+                        FileName = ExecutablePath,
+                        WorkingDirectory = WorkingDir,
                         UseShellExecute = true,
                         Verb = runAsAdmin ? "runas" : null
                     };
@@ -143,8 +167,8 @@ namespace Flow.Launcher.Plugin.Program.Programs
                     {
                         var info = new ProcessStartInfo
                         {
-                            FileName = FullPath,
-                            WorkingDirectory = ParentDirectory,
+                            FileName = ExecutablePath,
+                            WorkingDirectory = WorkingDir,
                             UseShellExecute = true
                         };
 
@@ -162,8 +186,8 @@ namespace Flow.Launcher.Plugin.Program.Programs
                     {
                         var info = new ProcessStartInfo
                         {
-                            FileName = FullPath,
-                            WorkingDirectory = ParentDirectory,
+                            FileName = ExecutablePath,
+                            WorkingDirectory = WorkingDir,
                             Verb = "runas",
                             UseShellExecute = true
                         };
@@ -224,6 +248,15 @@ namespace Flow.Launcher.Plugin.Program.Programs
 
                 return Default;
             }
+#if !DEBUG
+            catch (Exception e)
+            {
+                ProgramLogger.LogException($"|Win32|Win32Program|{path}" +
+                                                "|An unexpected error occurred in the calling method Win32Program", e);
+
+                return Default;
+            }
+#endif
         }
 
         private static Win32 LnkProgram(string path)
@@ -241,8 +274,7 @@ namespace Flow.Launcher.Plugin.Program.Programs
                     var extension = Extension(target);
                     if (extension == ExeExtension && File.Exists(target))
                     {
-                        program.LnkResolvedPath = program.FullPath;
-                        program.FullPath = Path.GetFullPath(target).ToLowerInvariant();
+                        program.LnkResolvedPath = Path.GetFullPath(target);
                         program.ExecutableName = Path.GetFileName(target);
 
                         var description = _helper.description;
@@ -270,16 +302,14 @@ namespace Flow.Launcher.Plugin.Program.Programs
                                            "|Error caused likely due to trying to get the description of the program",
                     e);
 
-                program.Valid = false;
-                return program;
+                return Default;
             }
             catch (FileNotFoundException e)
             {
                 ProgramLogger.LogException($"|Win32|LnkProgram|{path}" +
                                 "|An unexpected error occurred in the calling method LnkProgram", e);
 
-                program.Valid = false;
-                return program;
+                return Default;
             }
 #if !DEBUG //Only do a catch all in production. This is so make developer aware of any unhandled exception and add the exception handling in.
             catch (Exception e)
@@ -287,8 +317,7 @@ namespace Flow.Launcher.Plugin.Program.Programs
                 ProgramLogger.LogException($"|Win32|LnkProgram|{path}" +
                                                 "|An unexpected error occurred in the calling method LnkProgram", e);
 
-                program.Valid = false;
-                return program;
+                return Default;
             }
 #endif
         }
@@ -342,6 +371,13 @@ namespace Flow.Launcher.Plugin.Program.Programs
                     program.Description = info.FileDescription;
                 return program;
             }
+            catch (FileNotFoundException e)
+            {
+                ProgramLogger.LogException($"|Win32|ExeProgram|{path}" +
+                           $"|File not found when trying to load the program from {path}", e);
+
+                return Default;
+            }
             catch (Exception e) when (e is SecurityException || e is UnauthorizedAccessException)
             {
                 ProgramLogger.LogException($"|Win32|ExeProgram|{path}" +
@@ -351,7 +387,7 @@ namespace Flow.Launcher.Plugin.Program.Programs
             }
         }
 
-        private static IEnumerable<string> ProgramPaths(string directory, string[] suffixes, bool recursive = true)
+        private static IEnumerable<string> EnumerateProgramsInDir(string directory, string[] suffixes, bool recursive = true)
         {
             if (!Directory.Exists(directory))
                 return Enumerable.Empty<string>();
@@ -376,15 +412,14 @@ namespace Flow.Launcher.Plugin.Program.Programs
             }
         }
 
-        private static IEnumerable<Win32> UnregisteredPrograms(List<ProgramSource> sources, string[] suffixes, string[] protocols)
+        private static IEnumerable<Win32> UnregisteredPrograms(List<string> directories, string[] suffixes, string[] protocols)
         {
             // Disabled custom sources are not in DisabledProgramSources
-            var paths = ExceptDisabledSource(sources.Where(s => Directory.Exists(s.Location) && s.Enabled)
-                    .AsParallel()
-                    .SelectMany(s => ProgramPaths(s.Location, suffixes)))
-                    .Distinct();
+            var paths = directories.AsParallel()
+                            .SelectMany(s => EnumerateProgramsInDir(s, suffixes));
 
-            var programs = paths.Select(x => GetProgramFromPath(x, protocols));
+            // Remove disabled programs in DisabledProgramSources
+            var programs = ExceptDisabledSource(paths).Select(x => GetProgramFromPath(x, protocols));
             return programs;
         }
 
@@ -392,8 +427,8 @@ namespace Flow.Launcher.Plugin.Program.Programs
         {
             var directory1 = Environment.GetFolderPath(Environment.SpecialFolder.Programs);
             var directory2 = Environment.GetFolderPath(Environment.SpecialFolder.CommonPrograms);
-            var paths1 = ProgramPaths(directory1, suffixes);
-            var paths2 = ProgramPaths(directory2, suffixes);
+            var paths1 = EnumerateProgramsInDir(directory1, suffixes);
+            var paths2 = EnumerateProgramsInDir(directory2, suffixes);
 
             var toFilter = paths1.Concat(paths2);
 
@@ -402,26 +437,22 @@ namespace Flow.Launcher.Plugin.Program.Programs
             return programs;
         }
 
-        private static IEnumerable<Win32> PATHPrograms(string[] suffixes, string[] protocols)
+        private static IEnumerable<Win32> PATHPrograms(string[] suffixes, string[] protocols, List<string> commonParents)
         {
             var pathEnv = Environment.GetEnvironmentVariable("Path");
-            if (String.IsNullOrEmpty(pathEnv)) 
-            { 
-                return Array.Empty<Win32>(); 
+            if (String.IsNullOrEmpty(pathEnv))
+            {
+                return Array.Empty<Win32>();
             }
 
             var paths = pathEnv.Split(";", StringSplitOptions.RemoveEmptyEntries).DistinctBy(p => p.ToLowerInvariant());
 
-            var toFilter = paths.AsParallel().SelectMany(p => ProgramPaths(p, suffixes, recursive: false));
+            paths = paths.Where(x => commonParents.All(parent => !x.StartsWith(parent, StringComparison.OrdinalIgnoreCase)));
+
+            var toFilter = paths.AsParallel().SelectMany(p => EnumerateProgramsInDir(p, suffixes, recursive: false));
 
             var programs = ExceptDisabledSource(toFilter.Distinct())
-                .Select(x => Extension(x) switch
-                {
-                    ShortcutExtension => LnkProgram(x),
-                    UrlExtension => UrlProgram(x, protocols),
-                    ExeExtension => ExeProgram(x),
-                    _ => Win32Program(x)
-                });
+                .Select(x => GetProgramFromPath(x, protocols));
             return programs;
         }
 
@@ -496,9 +527,6 @@ namespace Flow.Launcher.Plugin.Program.Programs
 
             path = Environment.ExpandEnvironmentVariables(path);
 
-            if (!File.Exists(path))
-                return Default;
-
             return Extension(path) switch
             {
                 ShortcutExtension => LnkProgram(path),
@@ -545,7 +573,7 @@ namespace Flow.Launcher.Plugin.Program.Programs
 
         private static IEnumerable<Win32> ProgramsHasher(IEnumerable<Win32> programs)
         {
-            return programs.GroupBy(p => p.FullPath.ToLowerInvariant())
+            return programs.GroupBy(p => p.ExecutablePath.ToLowerInvariant())
                 .AsParallel()
                 .SelectMany(g =>
                 {
@@ -553,7 +581,7 @@ namespace Flow.Launcher.Plugin.Program.Programs
                     if (temp.Any())
                         return DistinctBy(temp, x => x.Description);
                     return g.Take(1);
-                }).ToArray();
+                });
         }
 
 
@@ -565,11 +593,15 @@ namespace Flow.Launcher.Plugin.Program.Programs
                 var suffixes = settings.GetSuffixes();
                 var protocols = settings.GetProtocols();
 
-                var unregistered = UnregisteredPrograms(settings.ProgramSources, suffixes, protocols);
+                // Disabled custom sources are not in DisabledProgramSources
+                var sources = settings.ProgramSources.Where(s => Directory.Exists(s.Location) && s.Enabled).Distinct();
+                var commonParents = GetCommonParents(sources);
+
+                var unregistered = UnregisteredPrograms(commonParents, suffixes, protocols);
 
                 programs = programs.Concat(unregistered);
 
-                var autoIndexPrograms = Enumerable.Empty<Win32>();
+                var autoIndexPrograms = Enumerable.Empty<Win32>(); // for single programs, not folders
 
                 if (settings.EnableRegistrySource)
                 {
@@ -585,11 +617,11 @@ namespace Flow.Launcher.Plugin.Program.Programs
 
                 if (settings.EnablePATHSource)
                 {
-                    var path = PATHPrograms(settings.GetSuffixes(), protocols);
-                    autoIndexPrograms = autoIndexPrograms.Concat(path);
+                    var path = PATHPrograms(settings.GetSuffixes(), protocols, commonParents);
+                    programs = programs.Concat(path);
                 }
 
-                autoIndexPrograms = ProgramsHasher(autoIndexPrograms);
+                autoIndexPrograms = ProgramsHasher(autoIndexPrograms).ToArray();
 
                 return programs.Concat(autoIndexPrograms).Where(x => x.Valid).Distinct().ToArray();
             }
@@ -651,11 +683,13 @@ namespace Flow.Launcher.Plugin.Program.Programs
             if (settings.EnableStartMenuSource)
                 paths.AddRange(GetStartMenuPaths());
 
-            paths.AddRange(from source in settings.ProgramSources where source.Enabled select source.Location);
+            var customSources = GetCommonParents(settings.ProgramSources);
+            paths.AddRange(customSources);
 
+            var fileExtensionToWatch = settings.GetSuffixes();
             foreach (var directory in from path in paths where Directory.Exists(path) select path)
             {
-                WatchDirectory(directory);
+                WatchDirectory(directory, fileExtensionToWatch);
             }
 
             _ = Task.Run(MonitorDirectoryChangeAsync);
@@ -676,7 +710,7 @@ namespace Flow.Launcher.Plugin.Program.Programs
             }
         }
 
-        public static void WatchDirectory(string directory)
+        public static void WatchDirectory(string directory, string[] extensions)
         {
             if (!Directory.Exists(directory))
             {
@@ -688,6 +722,10 @@ namespace Flow.Launcher.Plugin.Program.Programs
             watcher.Deleted += static (_, _) => indexQueue.Writer.TryWrite(default);
             watcher.EnableRaisingEvents = true;
             watcher.IncludeSubdirectories = true;
+            foreach (var extension in extensions)
+            {
+                watcher.Filters.Add($"*.{extension}");
+            }
 
             Watchers.Add(watcher);
         }
@@ -699,5 +737,38 @@ namespace Flow.Launcher.Plugin.Program.Programs
                 fileSystemWatcher.Dispose();
             }
         }
+
+        // https://stackoverflow.com/a/66877016
+        private static bool IsSubPathOf(string subPath, string basePath)
+        {
+            var rel = Path.GetRelativePath(basePath, subPath);
+            return rel != "."
+                && rel != ".."
+                && !rel.StartsWith("../")
+                && !rel.StartsWith(@"..\")
+                && !Path.IsPathRooted(rel);
+        }
+
+        private static List<string> GetCommonParents(IEnumerable<ProgramSource> programSources)
+        {
+            // To avoid unnecessary io
+            // like c:\windows and c:\windows\system32
+            var grouped = programSources.GroupBy(p => p.Location.ToLowerInvariant()[0]); // group by disk
+            List<string> result = new();
+            foreach (var group in grouped)
+            {
+                HashSet<ProgramSource> parents = group.ToHashSet();
+                foreach (var source in group)
+                {
+                    if (parents.Any(p => IsSubPathOf(source.Location, p.Location) &&
+                                            source != p))
+                    {
+                        parents.Remove(source);
+                    }
+                }
+                result.AddRange(parents.Select(x => x.Location));
+            }
+            return result.DistinctBy(x => x.ToLowerInvariant()).ToList();
+        }
     }
 }
diff --git a/Plugins/Flow.Launcher.Plugin.Program/Views/Models/ProgramSource.cs b/Plugins/Flow.Launcher.Plugin.Program/Views/Models/ProgramSource.cs
index fb32fb892..571dc0017 100644
--- a/Plugins/Flow.Launcher.Plugin.Program/Views/Models/ProgramSource.cs
+++ b/Plugins/Flow.Launcher.Plugin.Program/Views/Models/ProgramSource.cs
@@ -15,37 +15,39 @@ namespace Flow.Launcher.Plugin.Program.Views.Models
     /// </remarks>
     public class ProgramSource
     {
-        private string name;
+        private string name = string.Empty;
+        private string loc = string.Empty;
+        private string uniqueIdentifier = string.Empty;
 
-        private string loc;
         public string Location
         {
             get => loc;
             set
             {
-                loc = value;
-                UniqueIdentifier = value.ToLowerInvariant();
+                loc = value ?? string.Empty;
+                UniqueIdentifier = value;
             }
         }
-        public string Name { get => name ?? new DirectoryInfo(Location).Name; set => name = value; }
+
+        public string Name { get => name; set => name = value ?? string.Empty; }
         public bool Enabled { get; set; } = true;
 
-        public string UniqueIdentifier { get; private set; }
+        public string UniqueIdentifier
+        {
+            get => uniqueIdentifier;
+            private set
+            {
+                uniqueIdentifier = value == null ? string.Empty : value.ToLowerInvariant();
+            }
+        }
 
         [JsonConstructor]
         public ProgramSource(string name, string location, bool enabled, string uniqueIdentifier)
         {
-            loc = location;
-            this.name = name;
+            loc = location ?? string.Empty;
+            Name = name;
             Enabled = enabled;
-            if (location.Equals(uniqueIdentifier, StringComparison.OrdinalIgnoreCase))
-            {
-                UniqueIdentifier = location.ToLowerInvariant();  // To make sure old config can be reset to case-insensitive
-            }
-            else
-            {
-                UniqueIdentifier = uniqueIdentifier;  // For uwp apps
-            }
+            UniqueIdentifier = uniqueIdentifier;
         }
 
         /// <summary>
@@ -55,14 +57,15 @@ namespace Flow.Launcher.Plugin.Program.Views.Models
         /// <param name="enabled">enabled</param>
         public ProgramSource(string location, bool enabled = true)
         {
-            loc = location;
+            loc = location ?? string.Empty;
             Enabled = enabled;
-            UniqueIdentifier = location.ToLowerInvariant();  // For path comparison
+            UniqueIdentifier = location;  // For path comparison
+            Name = new DirectoryInfo(Location).Name;
         }
 
         public ProgramSource(IProgram source)
         {
-            loc = source.Location;
+            loc = source.Location ?? string.Empty;
             Name = source.Name;
             Enabled = source.Enabled;
             UniqueIdentifier = source.UniqueIdentifier;
diff --git a/appveyor.yml b/appveyor.yml
index d467792d7..aa490fd25 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -4,6 +4,10 @@ init:
 - ps: |
       $version = new-object System.Version $env:APPVEYOR_BUILD_VERSION
       $env:flowVersion = "{0}.{1}.{2}" -f $version.Major, $version.Minor, $version.Build
+      if ($env:APPVEYOR_REPO_BRANCH -eq "dev")
+      {
+        $env:prereleaseTag = "{0}.{1}.{2}.{3}" -f $version.Major, $version.Minor, $version.Build, $version.Revision
+      }
 - sc config WSearch start= auto # Starts Windows Search service- Needed for running ExplorerTest
 - net start WSearch
 
@@ -18,12 +22,6 @@ assembly_info:
   assembly_file_version: $(flowVersion)
   assembly_informational_version: $(flowVersion)
 
-skip_branch_with_pr: true
-
-skip_commits:
-  files:
-    - '*.md'
-
 image: Visual Studio 2022
 platform: Any CPU
 configuration: Release
@@ -57,6 +55,17 @@ deploy:
     on:
       APPVEYOR_REPO_TAG: true
 
+  - provider: GitHub
+    repository: Flow-Launcher/Prereleases
+    release: v$(prereleaseTag)
+    description: 'This is the early access build of our upcoming release. All changes contained here are reviewed, tested and stable to use.\n\nSee our [release](https://github.com/Flow-Launcher/Flow.Launcher/pulls?q=is%3Aopen+is%3Apr+label%3Arelease) Pull Request for details.\n\nFor latest production release visit [here](https://github.com/Flow-Launcher/Flow.Launcher/releases/latest)\n\nPlease report any bugs or issues over at the [main repository](https://github.com/Flow-Launcher/Flow.Launcher/issues)'
+    auth_token:
+      secure: ij4UeXUYQBDJxn2YRAAhUOjklOGVKDB87Hn5J8tKIzj13yatoI7sLM666QDQFEgv
+    artifact: Squirrel Installer, Portable Version, Squirrel nupkg, Squirrel RELEASES
+    force_update: true
+    on:
+      branch: dev
+
   - provider: GitHub
     release: v$(flowVersion)
     auth_token: