The outside window rail can now be rotated inside the door, towards the car, to make room for the window regulator and motor to pass it and come out of the opening in the door shell. Be sure to make note of how the rail and regulator are positioned so you can re-install them in the correct order/orientation.
If you want you may choose to tie the window rail to the door shell to free your second hand.
Take your time when removing the regulator. Rotate it a bit, jiggle it, move it backward and forward; there is no specific way to remove it, it's simply by feel. There is plenty of room to remove it so do not get discouraged.