I can confirm there are issues with this. All of the program components are failing to load the following dll's:
MSVCP90.dll
MSVCR90.dll
mfc90u.dll
Additionally, there are delay-load dll calls to:
afwcore.dll
afwcoreclient.dll
which are files that exist nowhere on my system.
All of the installed executables are from the currently-linked 5.0.377 installation package; however, they are signed with file versions 5.0.374. I never used a beta version prior to 5.0.377.
I installed MS Visual C++ 2001 SP1 on my system; however, Avast continued to not be able to load them, reporting that the dll's were unavailable. I shut down Avast's self-protection system and copied the files directly into the installation folder. Avast now sees that they're there, but none of my problems have been resolved with the program's inability to complete a manual update.
What is most frustrating of all is that the Avast developers are completely ignoring us. Even to make a post in the forum to say "hey, we released this way too early and it's complete crap, but we'll release something better in 93 hours" would make me a touch less angry. I'll give this until Thursday and then I'll be saying "thanks for the memories" and move on to a non-crap product.