CCleaner will not update

I am getting notification that there is an update available but when I try to update it fails with "Error opening file for writing". I looked at security and Administrator has full control of the folder. I'm the only user and admin on this machine.

CCleanerError.PNG

This has been working lately for some people:

https://forum.piriform.com/topic/53111-fail-to-install-ccleaner-pro-v5516939/?do=findComment&comment=302097