Deleted game and folder. Reinstalled game -> crash
If you just delete game folder on Windows machine - there's a folder with configuration settings still in the system.
You can find it somewhere in c:\User\[username]\_(maybe)_Application Data. (Sorry can't say exact location, coz I don't have KSP installed on Windows)
I'm not really sure that folder can cause the problem, but it's safe to delete it in order to reinstall the game.
But for the future, I would suggest you to properly uninstall any software on Windows instead of deleting folders.