@ Igor,
Now we/Avast have gone down the track of redundancy for old OS versions, which now spans many versions of Avast.
Is there any possibility of making old versions of Avast available on the official Avast.com (where the virus definitions are still supported as you mentioned) ?
Currently users have to trawl many of the file download services (filehippo, etc.), many of which just serve up the latest version or the small on-line installation stub installer.