The Registration Manager shows the installed registrations:

 

When you buy Ascendis Caller ID, you get a registration.  If you have not yet purchased Ascendis Caller ID, you will see this instead:

 

 

Ascendis Caller ID requires one registration (and therefore one purchase) for each phone line you want to monitor.  Most users only monitor a single phone line and therefore only need to purchase one copy of Ascendis Caller ID.  However, if you monitor (or want to monitor) two or more phone lines, you must buy additional copies of Ascendis Caller ID.  There is no difference between buying the initial and subsequent copies; all work the same.

 

Drag your registration files or the registration text onto this window to install the registrations.  When successful, you will see a confirmation message like so:

 

You can also copy the registration text to the clipboard, and then press the Paste Registration Now button.

 

 

If the registration is already installed, you will see the following:

 

When multiple registrations are installed, they will all be visible: