Everytime i restart i goes back to free edition on the MAcbook pro montana, anyone a solution?
For licensing issues you will need to contact support.
You can use the form here to raise your request: https://support.ccleaner.com/s/contact-form?language=en_US&form=general
Please be aware that support are very busy at the moment and are taking much longer that usual to answer.
(Up to a week, or even longer).
After submitting the form you should get a ticket number and will also get an automatic email reply (check your email spam folder), if you have those then you are in the queue, so please have patience and someone will get to your request.
Please also note that as it tells you in the email opening another ticket may put you back down the queue and so further delay the response.
(That's just the way that the queueing system works).