Yes, I did restart. When I follow your suggestion it shows 5.30. The popup, when I hover over the exe, shows 5.30 also. That says the install is not successful obviously. Tried the Safe Mode install which failed.
The last time I tried the install I paid closer attention to where the "hesitation" happens. It stalls at "checking system and updates". I moved the popup that declares the error I mentioned in the OP and the stall location shows "Delete file: C:\DOCUME~1\NexGen\LOCALS~1\Temp\CheckUpdate.log".
When I click ignore, the install continues and then declares it was successful. Aside from doing an unistall as you suggested, would it be worth just tossing the CCleaner folder in the Program Files folder and then trying to install the new version?
Thanks again for your help in this matter, mta.