[kq76]

You should really backup as much as possible. Even if you don't think you'll run into a problem, if you're just starting out with the game chances are you'll do something that you'll later wish you hadn't and want to back. I've been playing the game for 6 years now and I'm still finding myself constantly in this predicament. There's so much you can that it makes it very easy to realize you would have rather done it a different way.

I don't know if there's a solution to your exhibition games problem, but I doubt there is.

I don't know about the historical stats importing either, sorry.

I would also recommend, though, that you keep your separate questions in separate posts, especially now so soon after a release because the shorter your posts the more chance someone will read it all and provide a suggestion.

Good luck!