Avast Cleanup for Mac, module "Uninstall App" ceased to work

Avast Cleanup was working properly until one day, out of the blue, the “uninstall app” ceased to work. You open the window, select the item you want to uninstall, you click Ok, the window closes and the app is still there solidly implemented in the system. Tried many turn arounds, restart, clean cache, etc… with no avail. Any solution out there or should I scrap Avast all together ?

BTW, it seems there’s no one and no way to address the issue at Avast support service…