Interesting... I've never opened that folder with finder. If you cd into that directory from the command line and do an "ls", it likely shows "org.xlights". However, in Finder, it shows as just xLights. Not sure how that is handled.
Anyway, delete that xLights (or org.xlights) folder and try again. You WILL need to re-select the show folder, enter email address, reset preferences, etc...