Maybe what he meant is that you install the original chplay version, then open the game and login to your account. And then after that you close the game, open your files explorer, locate the "Android/data" folder and find "com.ProjectMoon.LimbusCompany" and rename that file to whatever you want( for example: com.ProjectMoon.LimbusCompany1) then you uninstall the game and install the modded one. After the game is installed, open it and exit the game so that the game will create a new "com.ProjectMoon.LimbusCompany" file in your "Android/data" folder. Exit the game and delete that file, and rename the "com.ProjectMoon.LimbusCompany1" (the previous data file) to the original name (com.ProjectMoon.LimbusCompany"). After that you reopen the game and login to your account. This method worked for me (im using my phone, unrooted with the signed apk, and also i didnt download any update in-game. I just open the game, login and exit, and do all the tricks above). If you have some problems like it doesnt work or it works once then the next time you play, it logged out of the account then you might want to do all the steps again until it works perfectly.