Delete these folders:
Jedi Academy\GameData\MBII_Launcher
C:\Users\YOUR_NAME\AppData\Local\Movie_Battles_Team
Go to Windows Control Panel => Programs, find a section about .NET Framework.
Switch off .NET 1.1, 2.0, 3.5.
Then, turn .NET 1.1, 2.0 and 3.5 on.