The easiest way to repair anapplication or program is to uninstall it by it's own installer first or by using the add/remove program. Usually the installer package has a repair option...try that first. If it is still a problem then uninstall it all the way and then reinstall the program....

Note: download SIW and use it to find the activation key first before you uninstall any program that needs to be reactivated on installation.Record the key for installation later.