They are held in with tension on some little plastic stubby clip-things...

There, that cleared it up, didn't it?
You can very carefully pry them out and repaint, or buy new ones - they were pretty cheap, IIRC. Use a plastic pry tool, and start at the top edge, next to the windshield. Of course, you will also have to remove the wiper arm on the driver's side to get that one out. Don't forget to index it on the stud so you can out it back on in roughly the same position.