So I download Beta 2 today, installed it as portable (as I don't want any other protection besides manual scanning), clicked on tray icon > Update and that's it. It hangs. I've waited 5 minutes to finish downloading the updates, but to no avail, had to terminate it through Task manager.
However when I checked the updates again, I've found that it really updated the definition files.
Using it on Win7 Professional 32 bit.