In case you have forgotten your user password, resetting is a two step operation based on the built-in features that program offers. You can change your password by firing up the software and use the first menu that appears then use the
Utilities button and a new window will appear with different options. It is called
Utilities and Admin menu from where you can perform different maintenance operations including password changing. From that menu click on
Change password button, select the username in question and type your new password.
My recommendation is to add a new user with administration rights and then change the password for the other username.