I just had to factory reset my computer, and I have downloaded the free version of CCleaner, but how do I download the professional version? I have already a 2 year paid membership.
To activate CCleaner Free as CCleaner Professional you simply have to enter your licence key into it.
In CCleaner v6 go to Options > License key to enter your key.
In CCleaner7 go to Settings > My Supscription to enter your key.