Add door to controller on Professional Door Controller Management

Add a door to an existing controller

Open up the controller APP

Select CONFIGURATION -> Controllers
pick the controller you want to work on (the one that you added the door contacts to)
click on EDIT
Then select "NEXT"

Here you'll see some existing doors.  Example, door #1 and #2
We are adding a 3rd door

Set the "ACTIVE" button to checkmark and give it a name.  

Assign the state of the door you want, normally "control".

All done!