while this wasn't a thing a few years ago, this is sop with all non us airlines, i think ua enforces this too. exit row window shade must be down takeoff landing taxiing and parked.
By down do you mean open or closed? SOP in all of Europe (and the few Asian or Australasian airlines I've been on) is all shades opened during takeoff/landing. I know on some aircraft window shades go up to open on the exits, but that varies by plane and size.