Hello Igor, Pavel, and/or Vlk... I found something strange after latest program update... see attachment please.
As soon as you start avast! main console, START button is active, and no area for scanning is selected. It should be disabled until you choose some areas to be scanned, right ?
Cheers !
EDIT: Just wanna say that it doesn't matter which of those skins you use... it happens on all of them, but I'm sure you are aware that it's something code related, not cosmetic issue...