Show message box if GUI crashes

AM2RPortHelperGUI/AM2RPortHelperGUI/MainForm.cs

@@ -153,6 +153,8 @@ public partial class MainForm : Form
         string iconPath = RawMods.GetProperPathToBuiltinIcons(nameof(Resources.icon), userIconPath);
         string splashPath = RawMods.GetProperPathToBuiltinIcons(nameof(Resources.splash), userSplashPath);
 
+        try
+        {
             if (checkboxLinux.Checked.Value)
             {
                 if (File.Exists(linuxPath))
@@ -174,12 +176,17 @@ public partial class MainForm : Form
                 if (File.Exists(macPath))
                     File.Delete(macPath);
                 
-            string modName = checkboxUseCustomSave.Text;
                 await Task.Run(() => RawMods.PortToMac(modZipPath, macPath, iconPath, splashPath, OutputHandlerDelegate));
             }
 
             labelProgress.Text = "Done!";
             OpenFolder(currentDir);
+        }
+        catch (Exception exception)
+        {
+            MessageBox.Show(this, "Stack Trace: " + exception, "Error", MessageBoxType.Error);
+            throw;
+        }
 
         SetDisableStatusOfAllElements(false);
     }