You need to contact us.  Hopefully, the old admin user has assigned you as an admin in the software.  If not, we can assign you as an admin from our end.  We will schedule admin training session.  After training we will make sure that you have access to both the user and the admin manuals.  Please don’t try to manage Guardian Tracking without training.  Guardian Tracking is not hard to manage, but without proper training you can make mistakes which can cause some issues.