How are Duster side pop-out windows held in place?

eV2 - I didn't do the work so I don't know if the stainless railing was lowered. Any suggestion on how to get instructions on tearing the window down so I can try to figure what's wrong? There's a vertical chrome piece on the leading edge of the window that I probably need to remove - but it isn't intuitively obvious how to get it off.