OK, think I've got this sorted.

Build 7 on Win 8.1

If the file is blank, that is, there is no MIDI information on any track, you don't get the question box for transpose up/down and the chords don't transpose. If you then enter a few MIDI notes you do get the question and the chords change as well.

Previously I'd only tried to simulate the problem on an existing song file so it worked ok.

It's more of a work-around than a fix but if you know what's going on it's not a big problem.

ROG.