Hello Daniel,
Thanks for writing in!
I checked the purchase code and the same is registered with a different user account (please see secure note for user name). Do you know the person owning the account or if you have multiple account and want to port the licence to this account, you will have to unlock the licence in other account and then register the same to your current account.
Please do the following to transfer the licence:
- Under Licence Manager page click on the padlock icon to unlock the licence. Unlocking a license is like freeing a license from your account. Once unlocked, it allows the license to be transferred/registered to another apex account. Please unlock the licence from current account and then re register the license in different account.
https://theme.co/apex/licenses


- After that login to the account where you want transfer the licence.
- Under Licences, click on Register Licence button and paste the purchase code.


Thanks.