You can specify whether QueryPlus either saves the password entered when connecting to a database (see Section 2.3.1, "connecting to the database") or not. When you connect for the first time, the password is automatically saved. If you do not want the password to be saved, remove the check mark from Save Password for a Direct Connect. If you want your password to be saved at a later time as well, select Save Password for a Direct Connect.
These options are contained in the cardfile card Common.