Navigate to this directory: /usr/share/applications
Then simply mark the application you want on your desktop, copy it, and paste it onto the desktop, that will create a desktop launcher.
Another method described in 1b here: viewtopic.php?f=42&t=86813
In Cinnamon all this is much easier.
Thank you for this thread. That’s all I can say. You most definitely have made this forum into something special. You clearly know what you are doing, you’ve covered so many bases. Thanks!