The first screen lists all your subscribers, their contact details and whether or not you have accepted them as a subscriber after they have applied for registration.
You may edit their details after clicking the edit button on the relevant subscriber row. It is here you can mark as accepting a subscriber after they register. The system will then send them an email telling them they have been accepted and that they should log in to place an order.
From the edit screen you can administer that subscriber's subscription, mark it as paid, print it or delete it.
From the edit screen you can also edit, delete and change that subscriber's details and password.