I can’t even remember how this was achieved, generally by looking in SETTINGS…
Look for the text ‘Show Path in Titlebar’ in Settings.
Settings can be found in the menu, the menu can be toggled with MetaM
You can also show the pathbar instead.
It’s really quite shocking how terribly difficult it is to discover these things for oneself.
Something you might not be aware of is that F10 is the ‘default’ now for opening the Menu - it works sometimes even when you cannot see a menu.