diff --git a/Flow.Launcher.Infrastructure/Image/ImageCache.cs b/Flow.Launcher.Infrastructure/Image/ImageCache.cs
index c3d7e5cfa..fdbdddb2d 100644
--- a/Flow.Launcher.Infrastructure/Image/ImageCache.cs
+++ b/Flow.Launcher.Infrastructure/Image/ImageCache.cs
@@ -26,7 +26,7 @@ namespace Flow.Launcher.Infrastructure.Image
         private const int MaxCached = 50;
         public ConcurrentDictionary<string, ImageUsage> Data { get; private set; } = new ConcurrentDictionary<string, ImageUsage>();
         private const int permissibleFactor = 2;
-
+        
         public void Initialization(Dictionary<string, int> usage)
         {
             foreach (var key in usage.Keys)
@@ -66,8 +66,7 @@ namespace Flow.Launcher.Infrastructure.Image
                 {
                     // To delete the images from the data dictionary based on the resizing of the Usage Dictionary.
                     foreach (var key in Data
-                        .Where(x => x.Key != Constant.MissingImgIcon
-                                 && x.Key != Constant.ErrorIcon
+                        .Where(x => x.Key != Constant.ErrorIcon
                                  && x.Key != Constant.DefaultIcon)
                         .OrderBy(x => x.Value.usage).Take(Data.Count - MaxCached).Select(x => x.Key))
                     {
@@ -95,5 +94,4 @@ namespace Flow.Launcher.Infrastructure.Image
             return Data.Values.Select(x => x.imageSource).Distinct().Count();
         }
     }
-
 }
\ No newline at end of file
diff --git a/Flow.Launcher.Infrastructure/Image/ImageLoader.cs b/Flow.Launcher.Infrastructure/Image/ImageLoader.cs
index 92cf9ac3f..73f565a33 100644
--- a/Flow.Launcher.Infrastructure/Image/ImageLoader.cs
+++ b/Flow.Launcher.Infrastructure/Image/ImageLoader.cs
@@ -216,10 +216,9 @@ namespace Flow.Launcher.Infrastructure.Image
 
         public static bool CacheContainImage(string path)
         {
-            return ImageCache.ContainsKey(path);
+            return ImageCache.ContainsKey(path) && ImageCache[path] != null;
         }
 
-
         public static ImageSource Load(string path, bool loadFullImage = false)
         {
             var imageResult = LoadInternal(path, loadFullImage);
diff --git a/Flow.Launcher.Plugin/Flow.Launcher.Plugin.csproj b/Flow.Launcher.Plugin/Flow.Launcher.Plugin.csproj
index c5ab7dd3b..0f6450d18 100644
--- a/Flow.Launcher.Plugin/Flow.Launcher.Plugin.csproj
+++ b/Flow.Launcher.Plugin/Flow.Launcher.Plugin.csproj
@@ -14,10 +14,10 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <Version>1.2.2</Version>
-    <PackageVersion>1.2.2</PackageVersion>
-    <AssemblyVersion>1.2.2</AssemblyVersion>
-    <FileVersion>1.2.2</FileVersion>
+    <Version>1.3.0</Version>
+    <PackageVersion>1.3.0</PackageVersion>
+    <AssemblyVersion>1.3.0</AssemblyVersion>
+    <FileVersion>1.3.0</FileVersion>
     <PackageId>Flow.Launcher.Plugin</PackageId>
     <Authors>Flow-Launcher</Authors>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
diff --git a/Flow.Launcher/Languages/sk.xaml b/Flow.Launcher/Languages/sk.xaml
index 8b9487b21..bf001d507 100644
--- a/Flow.Launcher/Languages/sk.xaml
+++ b/Flow.Launcher/Languages/sk.xaml
@@ -5,8 +5,8 @@
     <system:String x:Key="registerHotkeyFailed">Nepodarilo sa registrovať klávesovú skratku {0}</system:String>
     <system:String x:Key="couldnotStartCmd">Nepodarilo sa spustiť {0}</system:String>
     <system:String x:Key="invalidFlowLauncherPluginFileFormat">Neplatný formát súboru pre plugin Flow Launchera</system:String>
-    <system:String x:Key="setAsTopMostInThisQuery">Pri tomto dopyte umiestniť navrchu</system:String>
-    <system:String x:Key="cancelTopMostInThisQuery">Zrušiť umiestnenie navrchu pri tomto dopyte</system:String>
+    <system:String x:Key="setAsTopMostInThisQuery">Pri tomto zadaní umiestniť navrchu</system:String>
+    <system:String x:Key="cancelTopMostInThisQuery">Zrušiť umiestnenie navrchu pri tomto zadaní</system:String>
     <system:String x:Key="executeQuery">Spustiť dopyt: {0}</system:String>
     <system:String x:Key="lastExecuteTime">Posledný čas realizácie: {0}</system:String>
     <system:String x:Key="iconTrayOpen">Otvoriť</system:String>
@@ -22,7 +22,7 @@
     <system:String x:Key="dontPromptUpdateMsg">Nezobrazovať upozornenia na novú verziu</system:String>
     <system:String x:Key="rememberLastLocation">Zapamätať si posledné umiestnenie</system:String>
     <system:String x:Key="language">Jazyk</system:String>
-    <system:String x:Key="lastQueryMode">Posledný dopyt</system:String>
+    <system:String x:Key="lastQueryMode">Posledné vyhľadávanie</system:String>
     <system:String x:Key="LastQueryPreserved">Ponechať</system:String>
     <system:String x:Key="LastQuerySelected">Označiť</system:String>
     <system:String x:Key="LastQueryEmpty">Vymazať</system:String>
@@ -34,7 +34,7 @@
     <system:String x:Key="hideOnStartup">Schovať Flow Launcher po spustení</system:String>
     <system:String x:Key="hideNotifyIcon">Schovať ikonu z oblasti oznámení</system:String>
     <system:String x:Key="querySearchPrecision">Presnosť vyhľadávania</system:String>
-    <system:String x:Key="ShouldUsePinyin">Dá sa použiť Pinyin</system:String>
+    <system:String x:Key="ShouldUsePinyin">Použiť Pinyin</system:String>
 
     <!--Setting Plugin-->
     <system:String x:Key="plugin">Plugin</system:String>
@@ -96,11 +96,11 @@
     <system:String x:Key="version">Verzia</system:String>
     <system:String x:Key="about_activate_times">Flow Launcher bol aktivovaný {0}-krát</system:String>
     <system:String x:Key="checkUpdates">Skontrolovať aktualizácie</system:String>
-    <system:String x:Key="newVersionTips">Je dostupná nová verzia {0}, prosím, reštartujte Flow Launcher.</system:String>
+    <system:String x:Key="newVersionTips">Je dostupná nová verzia {0}, chcete reštartovať Flow Launcher, aby sa mohol aktualizovať?</system:String>
     <system:String x:Key="checkUpdatesFailed">Kontrola aktualizácií zlyhala, prosím, skontrolujte pripojenie na internet a nastavenie proxy k api.github.com.</system:String>
     <system:String x:Key="downloadUpdatesFailed">
         Sťahovanie aktualizácií zlyhalo, skontrolujte pripojenie na internet a nastavenie proxy k github-cloud.s3.amazonaws.com, 
-        alebo prejdite na https://github.com/Flow-Launcher/Flow.Launcher/releases pre manuálne stiahnutie aktualizácií.
+        alebo prejdite na https://github.com/Flow-Launcher/Flow.Launcher/releases pre manuálne stiahnutie aktualizácie.
     </system:String>
     <system:String x:Key="releaseNotes">Poznámky k vydaniu</system:String>
 
diff --git a/Flow.Launcher/ViewModel/ResultViewModel.cs b/Flow.Launcher/ViewModel/ResultViewModel.cs
index 0909b342f..6805f31aa 100644
--- a/Flow.Launcher/ViewModel/ResultViewModel.cs
+++ b/Flow.Launcher/ViewModel/ResultViewModel.cs
@@ -2,7 +2,6 @@
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Media;
-using System.Windows.Threading;
 using Flow.Launcher.Infrastructure;
 using Flow.Launcher.Infrastructure.Image;
 using Flow.Launcher.Infrastructure.Logger;
@@ -18,7 +17,6 @@ namespace Flow.Launcher.ViewModel
         {
             private T defaultValue;
 
-
             private readonly Action _updateCallback;
             public new T Value
             {
@@ -30,13 +28,14 @@ namespace Flow.Launcher.ViewModel
                         {
                             _updateCallback();
                         });
+
                         return defaultValue;
                     }
-                    else if (!base.Value.IsCompleted)
-                    {
+                    
+                    if (!base.Value.IsCompleted || base.Value.IsFaulted)
                         return defaultValue;
-                    }
-                    else return base.Value.Result;
+
+                    return base.Value.Result;
                 }
             }
             public LazyAsync(Func<Task<T>> factory, T defaultValue, Action updateCallback) : base(factory)
@@ -45,8 +44,8 @@ namespace Flow.Launcher.ViewModel
                 {
                     this.defaultValue = defaultValue;
                 }
+
                 _updateCallback = updateCallback;
-                
             }
         }
 
@@ -55,10 +54,14 @@ namespace Flow.Launcher.ViewModel
             if (result != null)
             {
                 Result = result;
-                Image = new LazyAsync<ImageSource>(SetImage, ImageLoader.DefaultImage, () =>
-                    {
-                        OnPropertyChanged(nameof(Image));
-                    });
+
+                Image = new LazyAsync<ImageSource>(
+                            SetImage, 
+                            ImageLoader.DefaultImage,
+                            () =>
+                                {
+                                    OnPropertyChanged(nameof(Image));
+                                });
             }
 
             Settings = settings;
@@ -97,13 +100,17 @@ namespace Flow.Launcher.ViewModel
             }
 
             if (ImageLoader.CacheContainImage(imagePath))
+            {
                 // will get here either when icoPath has value\icon delegate is null\when had exception in delegate
                 return ImageLoader.Load(imagePath);
             else
             {
                 return await Task.Run(() => ImageLoader.Load(imagePath));
             }
-
+            else
+            {
+                return await Task.Run(() => ImageLoader.Load(imagePath));
+            }
         }
 
         public Result Result { get; }
@@ -131,6 +138,5 @@ namespace Flow.Launcher.ViewModel
         {
             return Result.ToString();
         }
-
     }
 }
diff --git a/Plugins/Flow.Launcher.Plugin.BrowserBookmark/plugin.json b/Plugins/Flow.Launcher.Plugin.BrowserBookmark/plugin.json
index 98db163ec..de4f3849b 100644
--- a/Plugins/Flow.Launcher.Plugin.BrowserBookmark/plugin.json
+++ b/Plugins/Flow.Launcher.Plugin.BrowserBookmark/plugin.json
@@ -4,7 +4,7 @@
   "Name": "Browser Bookmarks",
   "Description": "Search your browser bookmarks",
   "Author": "qianlifeng, Ioannis G.",
-  "Version": "1.2.1",
+  "Version": "1.3.1",
   "Language": "csharp",
   "Website": "https://github.com/Flow-Launcher/Flow.Launcher",
   "ExecuteFileName": "Flow.Launcher.Plugin.BrowserBookmark.dll",
diff --git a/Plugins/Flow.Launcher.Plugin.Calculator/Languages/sk.xaml b/Plugins/Flow.Launcher.Plugin.Calculator/Languages/sk.xaml
index dd52d5279..c08f0265c 100644
--- a/Plugins/Flow.Launcher.Plugin.Calculator/Languages/sk.xaml
+++ b/Plugins/Flow.Launcher.Plugin.Calculator/Languages/sk.xaml
@@ -12,5 +12,5 @@
     <system:String x:Key="flowlauncher_plugin_calculator_decimal_seperator_use_system_locale">Použiť podľa systému</system:String>
     <system:String x:Key="flowlauncher_plugin_calculator_decimal_seperator_comma">Čiarka (,)</system:String>
     <system:String x:Key="flowlauncher_plugin_calculator_decimal_seperator_dot">Bodka (.)</system:String>
-    <system:String x:Key="flowlauncher_plugin_calculator_max_decimal_places">Max. desatinných miest</system:String>
+    <system:String x:Key="flowlauncher_plugin_calculator_max_decimal_places">Desatinné miesta</system:String>
 </ResourceDictionary>
\ No newline at end of file
diff --git a/Plugins/Flow.Launcher.Plugin.Calculator/plugin.json b/Plugins/Flow.Launcher.Plugin.Calculator/plugin.json
index 16a46f4e5..709757d1a 100644
--- a/Plugins/Flow.Launcher.Plugin.Calculator/plugin.json
+++ b/Plugins/Flow.Launcher.Plugin.Calculator/plugin.json
@@ -4,7 +4,7 @@
   "Name": "Calculator",
   "Description": "Provide mathematical calculations.(Try 5*3-2 in Flow Launcher)",
   "Author": "cxfksword",
-  "Version": "1.0.2",
+  "Version": "1.1.3",
   "Language": "csharp",
   "Website": "https://github.com/Flow-Launcher/Flow.Launcher",
   "ExecuteFileName": "Flow.Launcher.Plugin.Caculator.dll",
diff --git a/Plugins/Flow.Launcher.Plugin.Color/plugin.json b/Plugins/Flow.Launcher.Plugin.Color/plugin.json
index dbba029c6..8c0c483ba 100644
--- a/Plugins/Flow.Launcher.Plugin.Color/plugin.json
+++ b/Plugins/Flow.Launcher.Plugin.Color/plugin.json
@@ -4,7 +4,7 @@
   "Name": "Colors",
   "Description": "Provide hex color preview.(Try #000 in Flow Launcher)",
   "Author": "qianlifeng",
-  "Version": "1.0.1",
+  "Version": "1.1.1",
   "Language": "csharp",
   "Website": "https://github.com/Flow-Launcher/Flow.Launcher",
   "ExecuteFileName": "Flow.Launcher.Plugin.Color.dll",
diff --git a/Plugins/Flow.Launcher.Plugin.ControlPanel/plugin.json b/Plugins/Flow.Launcher.Plugin.ControlPanel/plugin.json
index d7940125e..4f552a014 100644
--- a/Plugins/Flow.Launcher.Plugin.ControlPanel/plugin.json
+++ b/Plugins/Flow.Launcher.Plugin.ControlPanel/plugin.json
@@ -4,7 +4,7 @@
   "Name": "Control Panel",
   "Description": "Search within the Control Panel.",
   "Author": "CoenraadS",
-  "Version": "1.0.1",
+  "Version": "1.1.1",
   "Language": "csharp",
   "Website": "https://github.com/Flow-Launcher/Flow.Launcher",
   "ExecuteFileName": "Flow.Launcher.Plugin.ControlPanel.dll",
diff --git a/Plugins/Flow.Launcher.Plugin.PluginIndicator/plugin.json b/Plugins/Flow.Launcher.Plugin.PluginIndicator/plugin.json
index 7b2f66989..80900a445 100644
--- a/Plugins/Flow.Launcher.Plugin.PluginIndicator/plugin.json
+++ b/Plugins/Flow.Launcher.Plugin.PluginIndicator/plugin.json
@@ -4,7 +4,7 @@
   "Name": "Plugin Indicator",
   "Description": "Provide plugin actionword suggestion",
   "Author": "qianlifeng",
-  "Version": "1.0.1",
+  "Version": "1.1.1",
   "Language": "csharp",
   "Website": "https://github.com/Flow-Launcher/Flow.Launcher",
   "ExecuteFileName": "Flow.Launcher.Plugin.PluginIndicator.dll",
diff --git a/Plugins/Flow.Launcher.Plugin.PluginManagement/plugin.json b/Plugins/Flow.Launcher.Plugin.PluginManagement/plugin.json
index 3d73c2197..7b8262f79 100644
--- a/Plugins/Flow.Launcher.Plugin.PluginManagement/plugin.json
+++ b/Plugins/Flow.Launcher.Plugin.PluginManagement/plugin.json
@@ -4,7 +4,7 @@
   "Name": "Plugin Management",
   "Description": "Install/Remove/Update Flow Launcher plugins",
   "Author": "qianlifeng",
-  "Version": "1.0.1",
+  "Version": "1.1.1",
   "Language": "csharp",
   "Website": "https://github.com/Flow-Launcher/Flow.Launcher",
   "ExecuteFileName": "Flow.Launcher.Plugin.PluginManagement.dll",
diff --git a/Plugins/Flow.Launcher.Plugin.ProcessKiller/plugin.json b/Plugins/Flow.Launcher.Plugin.ProcessKiller/plugin.json
index 3e7ba4043..d769397a8 100644
--- a/Plugins/Flow.Launcher.Plugin.ProcessKiller/plugin.json
+++ b/Plugins/Flow.Launcher.Plugin.ProcessKiller/plugin.json
@@ -4,7 +4,7 @@
     "Name":"Process Killer",
     "Description":"kill running processes from Flow",
     "Author":"Flow-Launcher",
-    "Version":"1.1.1",
+    "Version":"1.2.1",
     "Language":"csharp",
     "Website":"https://github.com/Flow-Launcher/Flow.Launcher.Plugin.ProcessKiller",
     "IcoPath":"Images\\app.png",
diff --git a/Plugins/Flow.Launcher.Plugin.Program/Languages/sk.xaml b/Plugins/Flow.Launcher.Plugin.Program/Languages/sk.xaml
index ece9fea81..851233407 100644
--- a/Plugins/Flow.Launcher.Plugin.Program/Languages/sk.xaml
+++ b/Plugins/Flow.Launcher.Plugin.Program/Languages/sk.xaml
@@ -40,7 +40,12 @@
     <system:String x:Key="flowlauncher_plugin_program_plugin_description">Vyhľadávanie programov vo Flow Launcheri</system:String>
 	
     <system:String x:Key="flowlauncher_plugin_program_invalid_path">Neplatná cesta</system:String>
-    
+
+    <system:String x:Key="flowlauncher_plugin_program_customizedexplorer">Vlastný správca súborov</system:String>
+    <system:String x:Key="flowlauncher_plugin_program_args">Arg.</system:String>
+    <system:String x:Key="flowlauncher_plugin_program_tooltip_customizedexplorer">Môžete si prispôsobiť otváranie umiestnenia priečinka vložením Premenných prostredia, ktoré chcete použiť. Dostupnosť premenných prostredia môžete vyskúšať cez príkazový riadok.</system:String>
+    <system:String x:Key="flowlauncher_plugin_program_tooltip_args">Zadajte argumenty, ktoré chcete pridať pre správcu súborov. %s pre rodičovský priečinok, %f pre celú cestu (funguje iba pre win32). Pre podrobnosti pozrite webovú stránku správcu súborov.</system:String>
+	
     <!--Dialogs-->
     <system:String x:Key="flowlauncher_plugin_program_disable_dlgtitle_success">Úspešné</system:String>
     <system:String x:Key="flowlauncher_plugin_program_disable_dlgtitle_success_message">Úspešne zakázané zobrazovanie tohto programu vo výsledkoch vyhľadávania</system:String>
diff --git a/Plugins/Flow.Launcher.Plugin.Program/plugin.json b/Plugins/Flow.Launcher.Plugin.Program/plugin.json
index f3c378ba4..7d7a42e03 100644
--- a/Plugins/Flow.Launcher.Plugin.Program/plugin.json
+++ b/Plugins/Flow.Launcher.Plugin.Program/plugin.json
@@ -4,7 +4,7 @@
   "Name": "Program",
   "Description": "Search programs in Flow.Launcher",
   "Author": "qianlifeng",
-  "Version": "1.1.1",
+  "Version": "1.2.2",
   "Language": "csharp",
   "Website": "https://github.com/Flow-Launcher/Flow.Launcher",
   "ExecuteFileName": "Flow.Launcher.Plugin.Program.dll",
diff --git a/Plugins/Flow.Launcher.Plugin.Shell/plugin.json b/Plugins/Flow.Launcher.Plugin.Shell/plugin.json
index 19c617799..63e74d678 100644
--- a/Plugins/Flow.Launcher.Plugin.Shell/plugin.json
+++ b/Plugins/Flow.Launcher.Plugin.Shell/plugin.json
@@ -4,7 +4,7 @@
   "Name": "Shell",
   "Description": "Provide executing commands from Flow Launcher. Commands should start with >",
   "Author": "qianlifeng",
-  "Version": "1.0.1",
+  "Version": "1.1.1",
   "Language": "csharp",
   "Website": "https://github.com/Flow-Launcher/Flow.Launcher",
   "ExecuteFileName": "Flow.Launcher.Plugin.Shell.dll",
diff --git a/Plugins/Flow.Launcher.Plugin.Sys/plugin.json b/Plugins/Flow.Launcher.Plugin.Sys/plugin.json
index 269cba07e..8d4b9a238 100644
--- a/Plugins/Flow.Launcher.Plugin.Sys/plugin.json
+++ b/Plugins/Flow.Launcher.Plugin.Sys/plugin.json
@@ -4,7 +4,7 @@
   "Name": "System Commands",
   "Description": "Provide System related commands. e.g. shutdown,lock,setting etc.",
   "Author": "qianlifeng",
-  "Version": "1.0.1",
+  "Version": "1.1.1",
   "Language": "csharp",
   "Website": "https://github.com/Flow-Launcher/Flow.Launcher",
   "ExecuteFileName": "Flow.Launcher.Plugin.Sys.dll",
diff --git a/Plugins/Flow.Launcher.Plugin.Url/plugin.json b/Plugins/Flow.Launcher.Plugin.Url/plugin.json
index d2817fd35..be64f6708 100644
--- a/Plugins/Flow.Launcher.Plugin.Url/plugin.json
+++ b/Plugins/Flow.Launcher.Plugin.Url/plugin.json
@@ -4,7 +4,7 @@
   "Name": "URL",
   "Description": "Open the typed URL from Flow Launcher",
   "Author": "qianlifeng",
-  "Version": "1.0.1",
+  "Version": "1.1.1",
   "Language": "csharp",
   "Website": "https://github.com/Flow-Launcher/Flow.Launcher",
   "ExecuteFileName": "Flow.Launcher.Plugin.Url.dll",
diff --git a/Plugins/Flow.Launcher.Plugin.WebSearch/plugin.json b/Plugins/Flow.Launcher.Plugin.WebSearch/plugin.json
index 7b40caea5..329f1c41d 100644
--- a/Plugins/Flow.Launcher.Plugin.WebSearch/plugin.json
+++ b/Plugins/Flow.Launcher.Plugin.WebSearch/plugin.json
@@ -25,7 +25,7 @@
   "Name": "Web Searches",
   "Description": "Provide the web search ability",
   "Author": "qianlifeng",
-  "Version": "1.0.2",
+  "Version": "1.1.2",
   "Language": "csharp",
   "Website": "https://github.com/Flow-Launcher/Flow.Launcher",
   "ExecuteFileName": "Flow.Launcher.Plugin.WebSearch.dll",
diff --git a/SolutionAssemblyInfo.cs b/SolutionAssemblyInfo.cs
index fc81e57e7..018084a66 100644
--- a/SolutionAssemblyInfo.cs
+++ b/SolutionAssemblyInfo.cs
@@ -16,6 +16,6 @@ using System.Runtime.InteropServices;
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
 [assembly: ComVisible(false)]
-[assembly: AssemblyVersion("1.4.0")]
-[assembly: AssemblyFileVersion("1.4.0")]
-[assembly: AssemblyInformationalVersion("1.4.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("1.5.0")]
+[assembly: AssemblyFileVersion("1.5.0")]
+[assembly: AssemblyInformationalVersion("1.5.0")]
\ No newline at end of file
diff --git a/appveyor.yml b/appveyor.yml
index 1c10892c0..f5841da3e 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: '1.4.0.{build}'
+version: '1.5.0.{build}'
 
 init:
 - ps: |