Can't Access 3rd License

After doing several o/s upgrades and re-installing GP on my Mac, I tried to re-activate the license and it says there are no more activations available. Is there a way this can be reset. I have it installed on 2 laptops and it had been on my Mac Desktop earlier. Any suggestions Dan? Thanks!

raise a support ticket

in general before upgrading the os you should deactivate your license on the machine

Thanks Paul. I saw that after the fact unfortunately.

Thanks. Good advice. I have done so.