I can change the time in BRU, and it now shows correctly. (The actual time of taking the photo shows in the "Modified" column.) But in explorer the original time is showing up.
This didn't used to be true -- I could change times when I took photos in multiple time zones. I don't know what has changed, and I don't know if I'm doing something wrong, but I can't seem to actually change the file time, even though it shows as changed in BRU.