You should do the following:
Sign in to Cerebro as universe administrator;
Open the Cerebro administrator panel (Main menu - Tools - Administrator...);
In the Administrator panel go to the Universe tab;
In the Universe tab open License list tab;
At the top of the tab, click Get HostID used in license generation;
In the appeared window, copy the text from the HostID field and send it to the Cerebro vendor (email at support@cerebrohq.com).