the trim piece is held in place with 5 inserts.
Three with an aft facing tab, one with a front facing tab, and one like a hook.
Start at the aft edge, insert a narrow screw driver and pry lightly to move the tab while you pull down.
Work your way forward.
Lastly pull aft to remove the hook-insert.
Install: hook the front, push the inserts in from front to back.