Don't support this garbage. The information is all available with File > Get Info. You can calculate hashes with terminal (if you know what they are / need them, you know how to do this) and you can view the Hex for free with HexEdit (also here on MacUpdate).
Seriously, don't pay someone for this garbage - it only encourages them. Look through their apps, they're all one trick command line ponies that the dev is asking you to pay for. They even feature a game with stolen Habbo graphics. This is not a moral person.