Originally Posted by Alan Johnson
WARNING: The update will render old save games un-usable since the update is essentially a new copy of the game. We apologize for any inconvenience this may cause. If you're not running into any graphical errors, we recommend finishing the game before updating as to not lose your game progress.
This would have been nice to have on the app update information - I just updated my game without knowing this and now have to play through the majority of it again.