Firstly you need to pull up the 'Customize...' option by right-clicking
on any populated toolbar.* I say populated because in my case the menu
toolbar was without any menu items at all, and didn't respond to a
right-click.Secondly navigate to the 'Toolbars' tab and highlight the
Menu Bar option. Click on Reset button to the right and viola your menu
items magically reappear in the application.