K-Line Bay Window Caboose K612-1417

I have a K-Line Bay Window Caboose, stock K612-1417.    Recently, one of the windows popped out and is rattling inside.  I thought it would be a simple procedure to open up and service, but it is not.....Found on the net other owners who mentioned four deep-set screws on the frame, which attach to the roof-supposedly just remove those four screws, swing the ladders out of the way, and pop off the roof. It looks like the ladders are glued in at the frame, I can't swing them out.  I searched further, and found commentary from other owners who said it is too difficult, so they gave up trying.  So do I make things worse by pressing on, or do I just live with it. Or is there some trick I am missing.  I had the crazy that I would try to upgrade the lighting while I was CA gluing the window back in place, but it looks like neither of those plans is happening.