Can't update to Ccleaner pro

[allyn]

I downloaded the free version of CCleaner. I clicked on upgrade to pro and paid. I was sent an email where I clicked download and go the pro installer. I installed it and when I started it up with the intention of putting in the registration number I received. It opened to the Free Version of CCleaner with no where to put in the registration number. I clicked on upgrade to Pro and it just asked for me to pay again. What the heck is going on?

[nukecad]

I think you may be clicking the wrong button?

Now that you have a registration key you don't click the 'Upgrade' button again - instead you click on Options>About and then the blue 'Upgrade to pro' there; that's the one that brings up the box to enter your number.
Enter you number (copy/paste it from the email) and click 'Register'.

This is from the Windows version but it should be similar on a Mac.