Paid version - how many laptops/PCs?

Shoot me or reroute me if this is the wrong place, or what I want is out there and obvious, but I can't find the information I need:-

I use CCleaner Free, and it's great, but I need to keep 4 (non-business, all in one place in my home) laptops going - XP, Vista, 7, 8.

If I buy CCleaner Professional Plus, do I just get a licence for one of these - in which case i need to think carefully about where it should live and which ones should stay on Free - or can I legitimately run it on all 4?

as long as each PC it runs on is non-commercial, you are allowed to run the free version on all 4 just fine.

As far as the pro version, if you don't buy the boxed "unlimited" version at the store the license is one computer one year of pro-features

Quick question. I thought the license for the programs was a one time charge. Does the professional version coverage expire after one year or is it good for continued use and all updates/upgrades on one machine?

I am interested in the CCleaner Professional and the Professinal Plus.

Thanks in advance!

tsb

After 1 year updates will cease and priority support will cease