A user's password can be changed using the Edit User option.  Click on the Edit User button on the toolbar, or select Edit User from the File  menu.

 

 

 

 

 

The user's current password is hidden, but you can change it by entering a new password in the Password field.  You will also need to enter the same password in the Confirm field (this is to verify that you entered the password you thought you entered).  Click OK to save the new password.