I rarely use it either and just tried updating mine via Bootcamp Windows 7 on MacBook Pro. The update worked fine and for reference the current version is 3.6.0208.1.
Have you tried running it as an Admin and also in XP compatibility mode?
To check, right click the CCP program file and choose Properties then Compatibility tab
Mine is set as follows:
Run this program in compatibility mode is checked
Drop down box is set to Windows XP SP2
All other boxes are unchecked except for Run as Admin.
Also on the same Props screen there is a Security tab, for Admins, Allow should be checked for all permissions.
I have also tried to uninstall and reinstall the software with no success.
Is this from the URC control panel? I would think if you downloaded from there it would have given you the latest version.