That's odd, really. The files seem to be authentic (version 4.1.396). Are you positive that you're still getting the AsPack errors? It just doesn't make any sense...
Vlk,
I am not joking still having the same problem, and this is what i am going to do just about now.
1. Uninstall the v4.1.396
2. Clean out the Register file related to Avast
3. Reboot and reinstall v4.1.396 again
4. Do a full thorough scan with the archive file tick on
5. Then I will let you know. I hope