Hello glossback,
Where there is an 'install' file there is usually a corresponding 'uninstall' file. You will need to locate the uninstall file (you could check with the program developers support team). Once you have located the uninstall file right click on it and set that file to run in compatibility mode too. This should then uninstall the applications.
You could see if these links help:
http://www.sevenforums.com/general-discussion/28519-edit-compatibility-uninstall-setup.html
This forum post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.
John Barnett MVP: Windows XP Associate Expert: Windows Expert - Consumer: www.winuser.co.uk | vistasupport.mvps.org |xphelpandsupport.mvps.org |www.silversurfer-guide.com