Require staging directory as fallback (#34)

* Test requiring staging directory on Windows

* Special workaround v1

* Remove variable since its only used once

UnionPatcher.Gui/Forms/ModeSelectionForm.cs

@@ -29,9 +29,12 @@ public ModeSelectionForm() {
 
     private void openRemotePatcher(object sender, EventArgs e)
     {
-        if (OSUtil.GetPlatform() == OSPlatform.OSX)
+        if (!Directory.Exists("scetool"))
         {
-            Gui.CreateOkDialog("Workaround", "UnionPatcher RemotePatcher requires a staging folder on macOS, please set this to the directory of the UnionPatcher app!");
+            // This will always occur on macOS, so don't show this message for macOS users.
+            if (OSUtil.GetPlatform() != OSPlatform.OSX) Gui.CreateOkDialog("Workaround Triggered", ".NET could not locate the required files, triggering workaround.");
+
+            Gui.CreateOkDialog("Workaround", "UnionPatcher RemotePatcher requires a staging folder on macOS or in special circumstances on Windows, please set this to the directory of the UnionPatcher app or executable!");
             SelectFolderDialog dialog = new SelectFolderDialog();
             if (dialog.ShowDialog(this) != DialogResult.Ok)
             {
@@ -41,7 +44,7 @@ private void openRemotePatcher(object sender, EventArgs e)
             Directory.SetCurrentDirectory(dialog.Directory);
             if (!Directory.Exists("scetool"))
             {
-                Gui.CreateOkDialog("Workaround", "Invalid folder, remember to set the folder to the directory of the UnionPatcher app!");
+                Gui.CreateOkDialog("Workaround", "Invalid folder, remember to set the folder to the directory of the UnionPatcher app or executable!");
                 return;
             } 
         }