diff --git a/Wox.Plugin.SystemPlugins/Program/IProgramSource.cs b/Wox.Plugin.SystemPlugins/Program/IProgramSource.cs
index 44eb232e6f..f2443c46f7 100644
--- a/Wox.Plugin.SystemPlugins/Program/IProgramSource.cs
+++ b/Wox.Plugin.SystemPlugins/Program/IProgramSource.cs
@@ -32,7 +32,7 @@ namespace Wox.Plugin.SystemPlugins.Program
             switch (Path.GetExtension(file).ToLower())
             {
                 case ".exe":
-                    p.ExecuteName = global::System.IO.Path.GetFileName(file);
+                    p.ExecuteName = Path.GetFileName(file);
                     try
                     {
                         FileVersionInfo versionInfo = FileVersionInfo.GetVersionInfo(file);
diff --git a/Wox.Plugin.SystemPlugins/Program/ProgramSources/FileSystemProgramSource.cs b/Wox.Plugin.SystemPlugins/Program/ProgramSources/FileSystemProgramSource.cs
index a1985a7ede..c913143607 100644
--- a/Wox.Plugin.SystemPlugins/Program/ProgramSources/FileSystemProgramSource.cs
+++ b/Wox.Plugin.SystemPlugins/Program/ProgramSources/FileSystemProgramSource.cs
@@ -30,8 +30,10 @@ namespace Wox.Plugin.SystemPlugins.Program.ProgramSources
         public override List<Program> LoadPrograms()
         {
             List<Program> list = new List<Program>();
-            GetAppFromDirectory(BaseDirectory, list);
-
+            if (Directory.Exists(BaseDirectory))
+            {
+                GetAppFromDirectory(BaseDirectory, list);
+            }
             return list;
         }
 
diff --git a/Wox/Helper/Forker.cs b/Wox/Helper/Forker.cs
index ab7b284715..658e2e5b86 100644
--- a/Wox/Helper/Forker.cs
+++ b/Wox/Helper/Forker.cs
@@ -105,8 +105,19 @@ namespace Wox.Helper
             ThreadPool.QueueUserWorkItem(delegate
             {
                 Exception exception = null;
-                try { action(); }
-                catch (Exception ex) { exception = ex; }
+                try
+                {
+                    action();
+                }
+                catch (Exception ex)
+                {
+                    exception = ex;
+#if (DEBUG)
+                    {
+                        throw;
+                    }
+#endif
+                }
                 OnItemComplete(state, exception);
             });
             return this;