I would like to completely remove it off of the car without removing the whole top? (The zipper broke)
I removed mine with a razor knife, just be careful not to cut your fingers..
Look up an auto convertible top repair shop--they can fix it
You may not want to permanently remove the window on your own. If you have the $$$ bring it to a shop. They will sew on a new window and then remove your old one. If you remove it first you will make it very difficult to get the new one on straight. Enjoy!
Well can you bust the zipper itself, so you can manually pull on the plastic and undo the zipper? You could use a pair of pliers, and a flat screw driver to break apart the zipper, if it is jammed. Just be careful not to damage the car side, if you buy a replacement.