Unzip panel files, change folder name to suit, upload to your default html directory on your server. To test your panel is working put your domain url along with the folder name eg: yourdomain.com into a browser, login to the panel with admin admin, then change to make it more secure. Add your dns into the panel.
Open apk editor pro select the app select full decompile, open the smali files then go to,

smali_classes2/c/i/a/f/g$a.smali change the url to match your panel.

Then save and rebuild. Install the app login and it should work.