Hi Steve1209
As the Moderators have suggested please email us directly at support@piriform.com with some screenshots so we can assist you resolve the issue
Hey churchit101,
Non-profits are considered as commercial companies. However, we do offer a 20% discount to nonprofit companies.
Email sales@piriform.com for more info
Hi auwing,
You don't need a registration number for the free version of CCleaner so I think you might have downloaded the professional version by mistake.
You can download the latest version of CCleaner directly from http://www.piriform.com/ccleaner/download/