Hi and thanks for buying the game!
Yes, 1_9 is all you need. I have all the versions available in case someone want to try out an earlier versions to see what the game look like through out the development. Sorry if that caused some confusion.
Oh and forgot to mention - the reason it shrunk from 35mb down to 14mb is that I had used the wrong audio compression for the music. So there is nothing that has been deleted.