Depending on where it is in relation to the branches above, you might tie a 2oz lead fishing weight to a long line and try to throw it over the plane. If you manage, you may be able to pull the plane loose. Expect some damage though. But you should be able to salvage the motor, battery, and electronics at worst case. Get a spool of twisted nylon line, about 100 lb test. Even if you get the line stuck on a near brach, you may be able to shake the plane loose.

To bad you didn't have one of those 4D motors, you could have backed it out off the tree

Don