diff --git a/Flow.Launcher.Plugin/SharedCommands/FilesFolders.cs b/Flow.Launcher.Plugin/SharedCommands/FilesFolders.cs
index 6e00b8a27..5f003e351 100644
--- a/Flow.Launcher.Plugin/SharedCommands/FilesFolders.cs
+++ b/Flow.Launcher.Plugin/SharedCommands/FilesFolders.cs
@@ -22,7 +22,7 @@ namespace Flow.Launcher.Plugin.SharedCommands
         /// <param name="sourcePath"></param>
         /// <param name="targetPath"></param>
         /// <param name="messageBoxExShow"></param>
-        public static void CopyAll(this string sourcePath, string targetPath, Func<string, MessageBoxResult> messageBoxExShow)
+        public static void CopyAll(this string sourcePath, string targetPath, Func<string, MessageBoxResult> messageBoxExShow = null)
         {
             // Get the subdirectories for the specified directory.
             DirectoryInfo dir = new DirectoryInfo(sourcePath);
@@ -63,6 +63,7 @@ namespace Flow.Launcher.Plugin.SharedCommands
 #if DEBUG
                 throw;
 #else
+                messageBoxExShow ??= MessageBox.Show;
                 messageBoxExShow(string.Format("Copying path {0} has failed, it will now be deleted for consistency", targetPath));
                 RemoveFolderIfExists(targetPath, messageBoxExShow);
 #endif
@@ -78,7 +79,7 @@ namespace Flow.Launcher.Plugin.SharedCommands
         /// <param name="toPath"></param>
         /// <param name="messageBoxExShow"></param>
         /// <returns></returns>
-        public static bool VerifyBothFolderFilesEqual(this string fromPath, string toPath, Func<string, MessageBoxResult> messageBoxExShow)
+        public static bool VerifyBothFolderFilesEqual(this string fromPath, string toPath, Func<string, MessageBoxResult> messageBoxExShow = null)
         {
             try
             {
@@ -98,6 +99,7 @@ namespace Flow.Launcher.Plugin.SharedCommands
 #if DEBUG
                 throw;
 #else
+                messageBoxExShow ??= MessageBox.Show;
                 messageBoxExShow(string.Format("Unable to verify folders and files between {0} and {1}", fromPath, toPath));
                 return false;
 #endif
@@ -110,7 +112,7 @@ namespace Flow.Launcher.Plugin.SharedCommands
         /// </summary>
         /// <param name="path"></param>
         /// <param name="messageBoxExShow"></param>
-        public static void RemoveFolderIfExists(this string path, Func<string, MessageBoxResult> messageBoxExShow)
+        public static void RemoveFolderIfExists(this string path, Func<string, MessageBoxResult> messageBoxExShow = null)
         {
             try
             {
@@ -122,6 +124,7 @@ namespace Flow.Launcher.Plugin.SharedCommands
 #if DEBUG
                 throw;
 #else
+                messageBoxExShow ??= MessageBox.Show;
                 messageBoxExShow(string.Format("Not able to delete folder {0}, please go to the location and manually delete it", path));
 #endif
             }
@@ -152,7 +155,7 @@ namespace Flow.Launcher.Plugin.SharedCommands
         /// </summary>
         /// <param name="fileOrFolderPath"></param>
         /// <param name="messageBoxExShow"></param>
-        public static void OpenPath(string fileOrFolderPath, Func<string, MessageBoxResult> messageBoxExShow)
+        public static void OpenPath(string fileOrFolderPath, Func<string, MessageBoxResult> messageBoxExShow = null)
         {
             var psi = new ProcessStartInfo
             {
@@ -170,6 +173,7 @@ namespace Flow.Launcher.Plugin.SharedCommands
 #if DEBUG
                 throw;
 #else
+                messageBoxExShow ??= MessageBox.Show;
                 messageBoxExShow(string.Format("Unable to open the path {0}, please check if it exists", fileOrFolderPath));
 #endif
             }
@@ -179,10 +183,10 @@ namespace Flow.Launcher.Plugin.SharedCommands
         /// Open a file with associated application
         /// </summary>
         /// <param name="filePath">File path</param>
-        /// <param name="messageBoxExShow"></param>
         /// <param name="workingDir">Working directory</param>
         /// <param name="asAdmin">Open as Administrator</param>
-        public static void OpenFile(string filePath, Func<string, MessageBoxResult> messageBoxExShow, string workingDir = "", bool asAdmin = false)
+        /// <param name="messageBoxExShow"></param>
+        public static void OpenFile(string filePath, string workingDir = "", bool asAdmin = false, Func<string, MessageBoxResult> messageBoxExShow = null)
         {
             var psi = new ProcessStartInfo
             {
@@ -201,6 +205,7 @@ namespace Flow.Launcher.Plugin.SharedCommands
 #if DEBUG
                 throw;
 #else
+                messageBoxExShow ??= MessageBox.Show;
                 messageBoxExShow(string.Format("Unable to open the path {0}, please check if it exists", filePath));
 #endif
             }