For now, do not return to menu when you have completed Story.
Note: It does, in fact, work! I tried it myself.
FOR PEOPLE WITH THE 1 PIXEL WINDOW ISSUE:
1. Go into C:\Users\[yourname]\AppData\LocalLow.
2. Delete LJ LephemStar.
3. Go to Recycle Bin.
4. Click Empty Recycle Bin or delete LJ LephemStar.
5. Click Yes, I want to delete these items.
The Whole Window Situation
1. Press Windows+R.
2. Type regedit.exe.
3. Accept the administrator prompt.
4. In the search bar, copy: Computer\HKEY_CURRENT_USER\SOFTWARE\LJ LephemStar or navigate to it.
5. Delete LephemStar.
This is safe.
6. Confirm Key Delete. WARNING: all of your data might be deleted.
Just To Be Sure Anyways
1. Delete everything related to Scratchin Melodii.
2. Delete it in the recycle bin too.
Reinstalling The Game
1. Reinstall the game.
2. Your window issue should be fixed!
Hope I've saved your life.