Happened to me too when I entered full screen mode. Wouldn't boot up the game again after it crashed. I just had to switch to windowed in order for it to load... hopefully something that will be addressed in the next patch.
This also happens to me since yesterday it has done it three times now very annyoing. Every other game i have runs great so i can not work out the problem i guess its the patch like been said in this thread have to wait it seems sucks :(
i had three crashes yesterday. twice related to windows trying to tell me new software was ready to download... and the third time the game just crashed. each time only a little box telling me some directx error occurred and the game needs to quit - which it does - promptly, how polite of it. :)
btw - i'm running in full screen mode.
Arduino Edenfell, Lancer Disciple of War and Magic Black Shroud, Gridania Mysidia