The Avast License Agreements page
(at https://www.avast.com/en-us/eula)
has a link for the “License Agreement” for
“Avast Free products”
(https://www.avast.com/en-us/eula-avast-free-products).
There
(at https://www.avast.com/en-us/eula-avast-free-products)
“The Avast End User License Agreement - Free version”
appears (to me) to contain no prohibition on non-commercial use.
However, the
“AVAST END USER LICENSE AGREEMENT - (FREE VERSION)”
(hidden at
http://files.avast.com/files/legal/eula-avast-free.pdf)
says:
“The Software must be used exclusively 1) by you as an individual or members of your household solely for private non-commercial purposes or …”
Which is correct?