Thank you
.
I tried to Activate as shown in the video, but even after the two screens, where I chose to remain with free antivirus, the subscription did not change.... kept showing 29 days.
I then downloaded a fresh setup of Avast free, and uninstalled this one. Ran the Avast Uninstall utility, and then installed again.
This time, I did not have to click the Activate button, in fact it wasn't there, just the Upgrade button was there, and subscription showed for an year.
I don't know what happened wrong the first time. Quite weird.