I need the Mac version of CCLeaner Pro and downloaded the PC version by accident. How do I correct this?
Did you already pay for and recieve an activation key?
Unfortunately a PC key won't work with a MAC version, or vice-versa.
So you can't just download the other version and put your key in.
Fortunately if you contact Piriform support they should be able to transfer your a current valid MAC key to a PC one.
You can contact support using the form at https://support.piriform.com/hc/en-us/requests/new or just by emailing support@ccleaner.com