After you moved the userSetup.py file into your maya\scripts folder and restarted Maya, did you get the dialog box asking you to locate your Maya Tools directory, and did you point that to the UE4/Engine/Extras/Maya_AnimationRiggingTools folder where the userSetup.py file was originally located?
If you did all of that correctly, I am not sure why you are not able to see the Epic Games menu in Maya. Try deleting any instances of userSetup.py that you have in your scripts folders and go through the process again as outlined here. If that still does not work for you, please let us know.