Stop trying to SELL ME on products I have already purchased. It is annoying.
Change your Avast UI > Settings > Personal Privacy and also Avast UI > Settings > Notifications.
See images below These are my settings on Avast Antivirus Free, with the paid version you should have more options in the first image.
I’m still not sure whether it still works for users of the paid versions, because as I said here my 3 devices (W7 + 2 W10) regularly receive offers to buy other avast products even though I’ve set premium not to receive them…and this has been the case for the last 2 or 3 build versions 