Well my thing isn't really a solution for the problem, it's just a way to temporarily deal with it. I'll clarify. Whenever I quit MUGEN, the screen was all messed up so I went into Display properties and changed the Color Quality from 32 bit to 16 bit. When asked to keep the settings, I said no. The reason I did this is because changing from 32 bit to 16 bit refreshes everything on the screen so it brings it back to normal.