Change menubar - VBA

I've created a custom menu bar, and I specify it in code for users with the
Startup Properties statements:

Application.MenuBar = "Custom Menubar"

This works, and the custom menu bar appears. NOW I want to insert another
statement into the code for other users who are directed to another section
in the code. I want the default startup MenuBar to replace the custom one.
Does anyone know how to call up the default menubar? Once you go down the
road of naming a custom menubar, Access won’t cancel out, and I need to
specify custom menu bars for each object.

Thanks for your help.