In december, when I downloaded for the first time the license, I also kept a copy of it. But two months later I had to do a OS reinstall, and I was able to redownload the same license. That was the moment when I deleted the copy, because I thought that I would be able to download the license whenever I want form my Avast account.
The Avast support haven't reply yet to my ticket. This is not fair, as you can see in the picture I posted above, I didn't stop after 21 invites. At this moment I have 75 recommendations.
Sorry for my english, is not my native language