There's a great description on how to copy a project in Android Studio, which I followed with 99% success: Android Studio - How to copy a project?
However, there is one small sticking point I'm worried will bite me in the butt later -- In the project structure panel, the build.gradle scripts still refer to the old version of the project (GPS_Mark3) instead of the new one (GPS_Mark4). I have tried refactor / renaming everything I can think of, rebuilding the project, cleaning the project, syncing with Gradle files, closing / reopening the IDE... How can I fix this? Or, is it just a weird quirk I should forget about and doesn't matter?