Stand on a stepladder beneath the new unit and hold the "Program/Set" button for approximately five seconds until both LEDs next to the button glow blue.
Release the "Program/Set" button. The long LED light should go out, leaving the circular one glowing blue.
Press and release the "Program/Set" button again; the long LED should glow purple while the circular one goes out.
Press the button twice on the remote control that you want to control the door. The first time the LEDs will flash purple, and the second time they should flash blue and go out.
Test the remote. The door should open and close whenever you press the button you chose during the previous step.