Well, guys, that was my bad about SiD Unpacker. I seem to finally the major issue with unpacking files. Now Civ V and Fallout: New Vegas should unpack properly. I've also added a note in case you try to unpack the game before the release date (in case there are no Encryption keys available). BTW 1.4 beta was unpacking games more perfect than beta 4-6. That's because I updated the CDR reading system.
I still can't reproduce the "MadException" bug when you exit the program. I faced the problem occasionally, but when I try to reproduce it I can't make it appear again .
I'll leave 1.4 beta as it is and will replace current less stable beta links.