# Start new song
# Edit something, whatever (let’s call this “state 1”)
# Save song
# Edit some more (let’s call this “state 2”)
# Leave program (either by clicking “X” in top-right corner of window, or choosing File | Quit. When asked if you want to save, choose “yes”.
# When reopening file, it is in “state 2” – the program didn’t save.