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 email@example.com).