Shower Room Window Replacement 1995 Executive

Recently acrylic double glazed shower room window was damaged along the top when window stay jammed.
 Auto-Sleepers have supplied a replacement which has come complete with frame, new window  has three locking points, the old one just two. Whilst the old window was easy to remove / refit on top aluminium guide it is not clear how to remove complete frame and fit  the new one.
Has any one done this and can advise. Does it just unscrew, not immediatly obvious.

Carlo

Hi Carlo & welcome to the forum.

You might get a better response if you re-post this in the Monocoque section as this is the intro section and not all members will read it.

https://www.autosleeper-ownersforum.com/f39-auto-sleeper-monocoque-motorhomes-forum