Joie Andrew - I don't think there's a way to reset the password from the application other than the change password option each user is given on the login page - unfortunately this requires the old password.

Sean Lange - I think the data is encrypted in the database rather than the application.

Sorry took a while to get back to you. Thanks for the quick responses especially over the holiday period. We have set up the user with another account so its not quite as urgent as it was, although the problem with the old username is still there.