In 16.04, a right click on 'Files' (Nautilus) in the Unity launcher brought up a list of common places.
In 18.04 there are only 3 options ('New Window', 'Remove from Favourites' and 'Details'), none of them places.
Is it possible to add places to that menu?
Edit: Thank you, Pomsky for pointer to your post. I had already tried that, and did so again. This works fine to step 5. Nautilus opens as expected, but when the mouse hovers over it, it is called 'Files', not 'File Manager' as I'd expect, and when I add it to favourites, the message is 'Files has been added...' Then after step 6 the options I have added do not appear in the menu, only the 3 already there. I know Gnome is finding the right .desktop, because if I remove it, 'File Manger' ceases to appear in 'Activities'
EDIT 2: As Doug has said, I don't believe this is exactly a duplicate. The problem seems to be the numerous nautilus desktop files in /usr/share/applications.