Attached is a pic of the tool for removal.

Work the hooked end between the glass and trim, move the tool along until you feel it contact clip. The hooked end is intended to be able to gently pry the trim clip outward to release the trim.

I have found it helpful to use this tool in conjunction with a wooden paint stick or tapered carpenter shim (like for doors and windows in a house) to gently pry the trim up after prying the clip outward.

*edit* Also, when removing window trim that does not use rubber channel seal/gasket, its a good idea to cover the back sides of the tool with heavy tape (like duct tape) so as not to scratch the glass.