Technical,
Your effort is appreciated. I finally found the criteria on the Alwil site under Product information/Avast4.
It really does not explain what their definition of commercial use really is, however the condition that it must be for "home" use knocks everything else out. I can understand their view.
Like I said, I hate the legalize and that is why I always comply with the terms of license. When in doubt, I purchase the commercial version as I have with Avast Pro and other such software.
Lastly, the Avast team puts a large amount of time into giving all of us a product that we can rely on, and abuse of the "free" priviledge can be understood.
Again, sorry for my misinterpretation.
techie