ChordWizard

I direct musical theater and am trying to use ChordWizard to flesh out piano scores with band instruments. I have gotten as far as inputing a piano Midi file into ChordWizad and added base and rhythm. I have opted to add a trumpet but don't seem to be getting anywhere with it. I can't figure out how to use the automatic chord identification either. I am not a musician. Could use some help. I am working with Windows 10.