I've accidentally hidden the menubar in GIMP. How do I get it back?

Solution 1:

From:

https://docs.gimp.org/2.10/en/gimp-view-show-menubar.html

If the menubar is not displayed, you can right-click on the image to access the menubar entries.

Solution 2:

I can relate - without a menu bar, it's sometimes difficult.

But you can restore your window by right-clicking on an open image to bring up the context menu.

Choose View > Show Menubar and activate the option (not activated in the image below).

enter image description here