After setting up the program, select the "Tape" feature. 
Once in, load a
midi file by browsing for it. After it's loaded, select the 
Karaoke tab and
check off "Chords". Select "Edit" and select "Analyze 
song". Play song.
You can simplify the chord display by removing some 
of the tracks. There are some quirks: The "B" chord is 
displayed as "H"! Also, the flats are displayed I believe 
with a "j".