WARNING: This page is about a different car, the 2008 Suzuki Swift +, 2008 Pontiac Wave, and 2008 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View of Window Regulator Handle, Plastic Ring, and Metal Clip
Courtesy of GENERAL MOTORS CORP.
Push the plastic ring behind the window regulator handle toward the door to reveal the metal clip.
Pry off the metal clip.
Remove the window regulator handle and the plastic ring.