Cannot type databases that don't appear in drop down when using the Create Repository wizard (4302507)

Trying to create a new repository using the Administration | Install New rep.. wizard, but when trying to select the database from the dropdown, I'm unable to type the actual database name in.  However, in the main login window, if a database does not appear in the dropdown, I am able to type the database name and can connect. Would like to have the same functionality as I have in the main QCTO Login window i.e. the ability to either select from the dropdown OR type the database name directly.