Have installed CCleaner multiple times during OS rebuilds and never had an issue until now. Raxco's PerfectUpdater - indicates the expiry date on the invoice.) Subscription software purchased through cleverbridge - e.g. (Edit: these are the vendor's terms & conditions, sent from 'cleverbridge / Piriform Commercial Ltd'. I've got the original terms & conditions emailed to me upon purchase in January 2015 and they do not contain a section 5 like your link, nor do they mention a period of one year anywhere. This can be done by uninstalling the application and ensuring all files are deleted from CCleaner folder in Program Files, upon re-installing the application should now be the free version. Expiry notifications should only be recieved at application startup, if you wish to stop these you will need to convert your software back to the free version. In section 5 (Term and Termination of Service) it states that the term is for one year and that after which we will remove Priority Support and Automatic updates. Please see the following link for the End User License Agreement that was in place a the time of your purchase:

Just to be clear we have never had a one off license.

Ccleaner professional license key 5.18