Bought and downloaded today. I get checksum errors when I try to unpack.
Viewing post in Final Fantasy XI Braver comments
Just to tack on, as another dev: I just now downloaded the current version to check myself. Everything seems in working order, the images extract correctly as do all the music files, I opened them to confirm. Maybe your connection had a hiccup part of the way through and it didn't finish downloading all the way, I know I've had that issue before elsewhere.