How can I UPGRADE from CCleaner Professional to CCleaner Professional Plus?
Your best way of upgrading to Pro+ is to contact support.
You can raise a support ticket by using the form here: CCleaner Support Community
You can also contact CCleaner support by emailing: support@ccleaner.com
(The other option is to simply buy a new Pro+ licence, and then contact support to get your old and new licences ‘merged’ so that you don’t lose any time left on the old one. Either way though, if you want to keep the time on the licence that you have already paid for then you will have to contact support, so the first way is usually better).
Thanks, I will use the community support form.