There are two ( IIRC) clips that hold the panel in. They are associated with the moldings that surround the window, especially the lower molding. I've tried to remember how they fit, but I'm just getting too old, but if yuo pop off the outer edge of the lower window moldings, I hope it will become clearer.
Still trying to remove mine also. Got one off but bent and dented it, so not happy. Not sure what "hot" wire is, but my cold wire method didn't work. Couldn't really get under panel with wire and it kept breaking. Will try heat gun next.
The two clips are attached to the sail panel itself (at least on my '87) and don't really hold panel in, just all the adhesive underneath that does it. Not sure what adhesive they used, but is the strongest stuff I have ever seen.