Mod for randomizing creatures for hire

[RYTEDR]

Alright, this may be an obvious question, but I've just tried this program and I have a little bit of a problem. I've changed the values to what I want, but it seems like KB doesn't register the "decoded" file I used to replace the old file. Everything simply isn't there in the game (As in, the buildings, chests, and enemies in the "embryos" file do not appear). What am I doing wrong and, if possible, how do you "undecode" it back after you're finished?

Thanks.