The first time that you load into Face Off on your account, even if you've already played the tutorial in the past, it's going to offer to let you play the tutorial again. There are rewards for completing it, that you can only get once, so you might as well go through it.
Your cards, data, and account are still intact but we changed the tutorial set-up and it offers it to everyone again after the update. Whether you choose to do the tutorial or not your account is intact but you should do it because you get rewards. Everyone loves rewards!
If you are having trouble finding XL in the steam store to download it you can visit: This link
When you load into the game there have been reports of the store overlapping the packs. To fix this, until we get it fixed server side, just restart your game!