[Cannot register my CCleaner with registration key]

I am using CCLeaner for MAC.  Any other suggestions?

[Cannot register my CCleaner with registration key]

I cannot register my CCleaner Professional account with my new registration key.  I bought a keys for my three computers (2 MacBooks and a iMac).  And, when I attempted to register the CCleaner on one of my MacBooks, I received the following message: The registration process failed to save the key file.

Help!  Does any one have a suggested fix for this problem?

Any suggestions would be appreciated.

T