Currently, there is only one Deluxe file, so there aren't two Deluxe parts to buy. So if you buy it now (for $2), you get access to the files listed by the Download button.
However, in June, I will be making a second Deluxe file for Dexter's mom. When I have finished making that, I will add it to this animation and anyone who has already paid will get it for no extra charge.