There are two methods to register your Devolutions Server Free license: using the Devolutions Server Console or via the Devolutions Server web interface.
Locate your Devolutions Server Free license in the Serials section of the Devolutions Portal.
Devolutions Server Console
In the Devolutions Server Console, register the Devolutions Server license in Server – Edit – General – License.
Devolutions Server web interface
In the Devolutions Server web interface, register the Devolutions Server license in Administration – Server Settings – General – Serial.