Rename the Package name

Amm I tried to change the name of the package only with APK Editor Studio, but it gives an error that does not find the other screens, I also changed the name of the other screens but it crashes (also I know it is an outdated method and does not work but I tried).

Any way or solution? I would have no problem using the default package name that puts appzard, but I already have an app with a package name and I still want to continue using the constructor.