The Databases tab contains the Databases of Interest associated with the user profile. Only the Databases of Interest will be listed on the Data tab when creating a new session.
To limit the databases shown on the Data tab, highlight the databases you do not want to see and click the Hide button. If there are a small number of databases you want to see, you can click the Hide All button to move all of the databases to the Hidden Databases section. Then highlight the databases you want to see and click the Select button to move them back to the Databases of Interest section. You can also display a subset of the databases by making a selection in the Session Type field. Only the databases associated with the selected session type will be listed.