If similar to my 343, the panorama is first glued in then caulked. I am about to recaulk mine again. One of the 343 owners got a dealer fix that used marine batteries to help hold the glazing down while glued. The factory fix then went to screws with fender washers that were removed after the glue set.
I know of no way to remove the glazing short of destruction.
Sika has a manual for caulking marine glazing.
I used sika products on mine.
Try contacting Beneteau or a knowledgeable dealer.