Hey Angel!
Glad you sorted everything out and sorry I wasn't around to help you directly.
We use the RPA and Launcher method since AHITR (and many AVNs like it) have got too big for the .APK file format.
Also, going forward with updates, its the same process from going to version to version. I'd recommend deleting the old RPA whenever getting a new RPA,
If you have any questions or such, please feel free to poke me here or on Discord.
Take care and happy Rifting o/