Try this for the .npak files in "NABU Segments.zip" (tested on latest version, make sure OUTPUTFOLDER exists):
#!/usr/bin/env python3
import sys
import hashlib
from Crypto.Cipher import DES
from Crypto.Util import Padding
DESKEY=bytes((0x6e, 0x58, 0x61, 0x32, 0x62, 0x79, 0x75, 0x7a))...