Yes, it can be the master switch and still be only one window that does not work.
My master was bad and I tore apart the LR assembly, swapped switches, the whole 9 yards, only to figure out it was the master switch. That seems to be the first thing to go on these.
Odds are it's a combination of the main control switch (they are known to fail and NO switches will work if the main doesn't)
Oh, you didn't accidentally push in the CHILD switch to stop windows from working did you?
It's on the front edge of the master switch. If depressed, nothing works...