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.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/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..6d27e579e 100644
--- a/Plugins/Flow.Launcher.Plugin.Program/Programs/Win32.cs
+++ b/Plugins/Flow.Launcher.Plugin.Program/Programs/Win32.cs
@@ -23,7 +23,7 @@ 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; }
         public string FullPath { get; set; }
         public string LnkResolvedPath { get; set; }
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;