OK, first question , why did it take you until JULY to remove plastic and tape from your windows for something that happened in March (assuming -10°F happens that late in Fargo, ND)?? So rather that rag on you about that (because you have your reasons) here are two products that you can try that you probably have right now:
1) Gasoline. Yes, gasoline/gasoline-ethanole (NOT E85!). It is a "universal solvent" and it may do wonders on your baked-on adhesive.
2) Finger nail polish remover with acetone (NOT the easy-on-the-skin type which has an acetone-substitute), Again a "universal solvent" that eats through alot of different materials, like your adhesive.
On BIG word of caution!: Since the taped areas are near your door windows, the rubber seals need to be protected in some way. If you get either of these two solvents on those rubber parts, they will eat them for lunch, especially the acetone. You're going to need to be careful about applying them to the adhesive areas. DON'T just dump or pour it on the adhesive area because it WILL run into the seals and you will have a much bigger problem than you have now. Just a take a cotton cloth (like an old flannel bedsheet or dish towel) and wipe the adhesive area. You may just want to hold the cloth there for maybe 30 seconds to "soak" the adhesive, just don't use too much solvent on the cloth. I am afraid using a polyester micro-fiber cloth with either gasoline or acetone may not be chemically-compatable with that fabric.
Let us know how it works. Like I said, these are two "common" solvents most everybody has in their home.