Hi Jim,
The trick, to getting the wing-vent assemblies in and out is to take out the other window guide first, near the latch-end of the door. You should follow the procedure below: (roughly)
1. Roll window down
2. Remove outer window weatherstripping by prying the end nearest the door handle upwards and gently pull the piece up, detaching it from the door.
3. Find and remove a tiny phillips screw buried into the fuzzy piece of the inner window weatherstripping. It is near the door lock pull end of the piece and it secures the trim strip to the door. It can only be accessed with the window all the way down. When the screw is removed, pull up on the weatherstripping piece to remove.
4. Remove the inner door panel, roll window back up.
5. Remove 10mm bolt near bottom of door that secures the door-latch-end window track.
6. The window track will slip out of position by pulling/wiggling it downward. You may have to move the upper rubber piece attached to the window track out of the way of the top of the door, or detach it's two nipples from the door.
7. Carefully roll the window down, it should only be fitting into the front window track at this point (the wing-vent assembly).
8. Remove three 10mm bolts front the inner panel of the door that secures the wing-vent window.
9. Slide the window out the window track toward the door latch end of the door. It should be hanging from the cables.
10. Wiggle the wing-vent assembly up and out of the door.
Good luck,
-Matt