Gatekey56

I play KSP every day, i have over 1000 hours of game time to it, this morning when i booted up for some reason i could not click on a single menu option, the game is playing, sound and animation are there, but clicking the options dose nothing, ive tried updating drivers, uninstalling and reinstalling the game, and a few other things but nothing has worked. I am playing Vanilla KSP with no mods or anything, hope someone can help