A catch 22 is that you need to lower the car window to take the window off the regulator track, but the window is stuck in closed position. Don’t even try to force the window down – it won’t work. A suggestion was made to try to press the down button on the window switch and hit the engine of the regulator with a hammer. This may loosen the engine and allow the window to lower. If this doesn’t work, you need to cut the window regulator cable. The cable must be cut on the upper pulley side. Hold the window while you make the cut – you need another person to hold the window or you need to tape the window when doing this. Use a tough set of wire cutters.
Here is a good article on how the regulators work:
Update. If the window is stuck in the down position – you need to cut the cable on the bottom side. But how to reach it???? How about popping out the speaker? That works!
If the window comes off the rubber track, push the window forward towards the front of the car and the front rubber track has enough depth to allow you to reposition the window in the back rubber track.