If it is cyanoacrylate (superglue), soak it in acetone (if you live with someone who wears nail polish, nail polish remover is acetone). Put it in a small glass, deep enough to reach the arrow shaft/cover insert when the point is down. Cover the glass with plastic wrap so the acetone doesn't evaporate. Poke the arrow through the plastic wrap into the acetone. Not sure how long it will take, keep trying until you can gently grab the field point with pliers and wiggle the point out.