How do I uninstall OOTP 9
 

I just bought OOTP 11 so I wanted to get rid of OOTP 9, but when I try to uninstall it, either through the conrol panel or through the Out of the Park Developments folder in the Start Menu, I get a run time error message. I deleted the icon from my desktop so at least I don't see it all the time, but I'd like to remove the game completely. How do I do this? Thank you!