A save file wouldn't help. If I save before the battle that crashes, exit the game, restart the PC, start the game again, reload the save and fight the battle, there is a fair chance it won't crash when pressing done.
This issue normally presents itself after a battle, finishing a tournament, leave the tavern, leave a city you've been walking around in, or finish a prison break, essentially when you transition back to the campaign back, after you do any of those 2-3 times, as I already mentioned.
Just my 2 cents. I just bought the game yesterday and I've been crashing non stop, glad to see I'm not the only one.
