If you remove the regulator from the actual window, can you slide the window up by hand? It should move pretty freely up and down the racks at this point. Just be careful, there isn't much room for your hand and that glass can get heavy. Only 2 bolts attach the regulator to the actual glass. See section/page 20-10 (or page 836 of the PDF file) of the online service manual.
It's possible your regulator motor is spinning but the internal gears have met their maker. If you can get the glass up after disconnecting the regulator at least you can cut some wood or jury rig something to keep the glass up until you get a new reg.