How did you get it to update cause I'm having the same issue.
So I installed an app manager called files (by Marc apps & software, idk if it is 100% safe it is on Google play tho) and I copied all save files in another folder. Then I deleted the game, installed the new launcher and proceeded to install the game again. after that I recopied the files in. If you can't use the app for some reasons you should be able to plug your phone on a pc and copy the files from the pc as it has no restrictions