Hi - I'm sorry about that, my previous upload had a corrupt Generations save. I've uploaded a new version that should fix this problem, please let me know if it still doesn't work!
Are you on emulator? Unfortunately some emulators are known to crash when launching Generations, particularly Ryujinx. You may need to switch to a different emulator like Yuzu or Sudachi.
You're welcome! Thanks for the positive review. I'm working on Gens but probably won't 100% it for a while, since I've already played it so many times. I've updated the save with all Gens levels unlocked, but it's not 100% yet.