There should be four white plastic brackets at the inside edges of the valance, top and bottom. They might have a cover over the screws that needs to be pried off. Underneath are the screws. IIRC the shade will come off with the valance.
Tom, Patty, Hannah "The Big Dog" and Abby Kat, Indianapolis, Indiana 2000 36' FDS 72232 Our Photos
We live out in our old van. Travel all across this land. Drive until the city lights dissolve into a country sky, me and you - hand in hand.