Just lift the wiper arm, and pry up on the oppsite side of the cup on the wiper shaft. It should pop right off. ..........Jack
There is a serrated portion under the wiper...that holds the wiper on and prevents it from moving when it wipes...slide a flat screwdriver under the chromed edge of the wiper and twist...it should slowly move up...you may have to do this to two or three different parts of the edges. R-