One additional teensy tip: If you loaded that midi file via File=>Open Midi File.., the current style will be disabled. If it's disabled after you transfer the bass channel, for example, to the bass track, the track won't sound. So at the end of the above procedure, make sure the style is enabled. (Support is considering making this automatic.)

Also, note that while it might be helpful to edit the data on the Soloist track, it's not technically necessary to do so. Data can be moved/copied directly from Melody to the target track.

HTH -Ron