This game's saves are not encrypted. You guys can do it yourself. I just learned it from following the guide on this very website
What you need: all of this is free: iMazing (free version) and Notepad++ (need the plist viewer/editor plugin)
Backup the app onto your pc/mac, open Battleheart 2.imazingapp using 7zip (or WinRaR like the faq on this site suggests work too but I like 7zip more)
Go to Battleheart 2.imazingapp/Container/Library/Preferences and open the plist file (com.MikaMobile.BattleheartReturns.plist) in Notepad++
Look at the imgur pic below to see where you edit the fields
Note: download and install the Notepad++ bplist plugin to view the plist file in a much friendlier format
Make your edits and overwrite the file in the same folder and restore the app (as noted from the link)
https://imgur.com/a/kb4Mzy9