Hog4pc trouble

Hi guys, I got a little issue trying to uninstall Hog4pc.
I´m running the software on Windows 8.1. Now trying to uninstall with the recommended windows install cleanup, it disappeared from the list and the shortcut became a " blank piece of paper" icon. But doubleclicking this shortcut still opens the software.
Now, trying to install the software again I get an error message: Could not open key : UNKNOWN\components\(lots of registry digits). Same happens when trying to install Hog3pc.
Did this happen to anyone before or does anybody know a solution?
Thanks, JanG