So I redownloaded the game cause act 2 is out (I'm an android user) and it said it updated the game. Started from previous save, didn't do anything, started from act 2, was exactly the same, only now I'm missing my previous data. To top it all off, the game is running at like, 5 frames per second for some reason now.
https://www.makeuseof.com/make-android-game-friendly/ you could try this for the fps problems! to unlock the prvious date you could always use cheats to unlock the things you have already unlocked.