Jumping in on this as well rather than making a new thread. Tried everything, even breaking out the old disc copy of the game. Seems like the current FAF build doesn't know where to look for the save data folders. I could be wrong and it's a bigger issue than that, or might have simply been overlooked in the last few releases.
Would really appreciate a fix or even a workaround being looked into, nothing more frustrating than getting an hour into an offline game and having to scrap it completely because something else popped up.