Are you sure you can't just load up that save on the vanilla app in an emulator or on a spare mobile device or something? I don't think there's any other way for you to get past that crash. I completed that chapter by giving myself a shitload of energy ahead of time using the gem trick on the store, switching to the vanilla app, and playing through it. Worked just fine.
Does it still crash even if you load that save on the vanilla app?