"The 'advance pack' downloads have extras that seem to be outtakes/demo material for each song, which is pretty neat."

Can someone clarify for me... "The Wing" and "Strings and Attractors" 'advance pack' both have 'Extras' folders... But my " 'How Long" Does not. Was there a extras content that I'm missing for my "How Long" Maltitrack or was that exclusive to just the other two tracks?