Lost XFCE4 Applications Menu
New install of Slack 11, using Xfce 4 version 18.104.22.168.
I've been tweaking minor stuff - cursor focus, taskbar, etc. Suddenly, I'm having trouble with the desktop. Background changes don't take and a right-click on the desktop offers no app menu.
The only substantive thing I did (I think) is to unzip a couple of theme packages in /usr/share/themes. I can't get XFCE to find those, either, so help on that point is also welcome.
Mostly, I just need to get the menu back.
Removed ~..config/xfce4 and ~.config/xfce4-session directories and reinstalled the XFCE4 package in init level 3. Established a new session and all my customizations were gone, but still no menu and desktop still not accepting changes.