You can use Filter Database or Filter Driver to reduce the number of entries in the list.
Other features:
AQT remembers the databases you have recently signed onto. To display these, click on the Show Recent button at the top of the window.
AQT can remember the passwords used for your database sign-ons. To enable this, check the Save Password box. The password will be retrieved when you select a connection from the Recent Sign-on list.
You can specify that AQT auto-connects to a database when it starts. For more on this, see Showing Recent Sign-ons.