I'm not clear what it is that you are asking.
What is it that is or isn't being updated and exactly what is it that you have installed..
I don't believe anything is being forced on you, if you had Avast installed before you should have been able to continue on that. What isn't being updated ?
You don't say what that was or what version of Avast One you have (Paid or Free) ?
Currently Avast One is only available in Australia, so you must have opted in to get it.
There is a new Sub Forum for Avast One, perhaps this should have been posted there.
https://forum.avast.com/index.php?board=125.0