remove compatibility program

I installed one program using the compatibility wizzard because of an error condition with the install. Installed fine with the wizzard, but on execution, it doesn't connect to my UPS to provide any data, so I tried to uninstall it. Says it uninstalls, but remains in Programs etc. Nothing seems to have been removed. Still works but no useable data. No harm leaving it, but wonder if others have had a problem uninstalling programs.