Database Feedback can only be used with a proper license. The license key that you have received automatically unlocks the database feedback functionality. After the initial configuration of the Metatude Dialogue Server, you can see if the Database Feedback functionality is enabled. The Metatude Project Manager will contain two tabs, labeled 'Mapping' and 'Destination DB' if you log in as an Administrator and your license contains the database feedback functionality.
It is possible to upgrade your license in order to enable database feedback. For details on how to enter a new license key, please refer to the manual of the Metatude Dialogue Server.