Hi @maxxer,
avast! Free Antivirus is only for:
1) by you as an individual or members of your household solely for private noncommercial purposes or
2) by you as an educational establishment in the U.S.A. (public or non-profit educational institution/education organization - includes grades K-12 and higher, vocational/trade schools, head start programs or other entities with educational purposes under 501(c) of the IRS Publication 557 - Organization Reference Chart section) solely for your internal non-commercial purposes or
3) by you as a public library in the U.S.A. solely for your internal non-commercial purposes (whereas U.S.A. includes all 50 states, the District of Columbia, and the territories of American Samoa, Guam, Marianas, Puerto Rico, and the U.S. Virgin Islands) or
4) for internal support to you as a sole proprietorship or les très petites entreprises (TPE) with registered office in France. You may also make appropriate number of the backup copies of the Software but not more than ten.
But don't worry, AVAST Software has a discount program for non-profit organizations with a discount of 50% for new licenses and 65% in renewals. Contact with your nearest avast! reseller.