Oops, my mistake, I hadn't noticed the extra control when setting the key in the top left of the box. Very happy with the new look and feel now I'm starting to get used to it!
I'm using the app on an ipad with ios 7.03. When I click on the transposition button (mortarboard hat, not key change), and transpose up or down, it doesn't do anything. It used to alter the chords in the previous version. Since I'm the first one posting this I assume I'm doing something wrong...