Maybe it's helpful for you. I following these steps from 1.2.0 to 1.4.1:
- remove old version
- restart your phone
- install newest version from ch play
- launch the original version from ch play and waiting for login your account
- when logged in to your account, run the original game in the background
- uninstall original version why game is still running in background
- install mod version 1.4.1
- run and enjoy mod version
- if you can not login to your account (start with new account), just repeat and follow steps from begining.
This works for me on 1.2.0 and 1.4.1. Hope it's helpful for people who find the tips.