There are a total of three screws to remove, including the two you found at
the bottom of the panel. Once you pop the plate off that holds the power
window and power door lock switch, you will find the third screw. You will
also have to remove the black trim around the door handle. After the
screws, the switches, and inside door handle trim are removed, simply
lift-up on what's left and it the remaining panel will unsnap and come
off. Just be gentle and patient.