Tim, with an Easy-up, undo the two Tennax fasteners, one each side, before releasing the rear.
Similarly they are the last to be fitted when putting the hood up.
I also appreciate the reminder Graham, it's been so long since I used the hood - mainly because BHM showed me how to fold and stow it so neatly under the tonneau cover that I didn't want to disturb it. A few showers endured is a small price to pay for a neat cover - I always make it look like a pram!