Mine are held up with a clip. Either 2, 3 or 4 clips, depending on how long the shade is. Look along the edge of your blinds right at the ceiling. It's sometimes hard to see. There should be a small flange sticking out where those clips are. Take a flat headed screw driver and push the flange up, and that should release that clip. Do it for each clip.
Bill & Brigitte
06 Windsor PEQ, Cummins 400 ISL
2014 Honda CRV