Me and the wife went up there this evening at about 6:0opm and yes it was open. The Dick's door is shut, but you go through the reception next door (there's a sign on the door saying this way for Dick's) and go up the stairs. Lovely views over the downs. Stayed till about 7:00pm and then went over to The Swan!
I'm guessing that the double doors will be used for match days.