Vent window upper pivot questions

Either the screw or the piece it screws into is stripped on the upper pivot of one of my vent (wing) windows. Is there an easy fix? I have thought about replacing the pivot and screw. How does the pivot come off? Does it just slide off of the little post? This is on a 1967 Dart, but the door in question is from what I assume is 70 or later as it doesn't have the dimples for the convertible latch thing.

Thanks