Hi Snan,
The left column in the Organiser shows keyboard layouts in only one particular folder.
To make your keyboard layout show up, you have to click on "Set Folder…" and navigate to the folder containing your file.
Thanks for the images! Quote from the PDF manual:
"You can choose to install for the current user, or for all users on your computer (which … is not recommended for macOS 10.13 or later)."
Note to John:
How easy/complicated would it be to make Ukelele collect all the XML keyboard layouts on the Mac and have them show up in the left column, with the most recently changed ones at the top of the list? (To be more precise: all layouts except the ones installed!)
I guess the tricky thing would be to get the dragging to work when the files are not in one folder but all over the place, and especially how to uninstall one by dragging it: it’s not clear where it should go.