@DavidR It updated automically when I had it set to manual update
Since that bridge has already been crossed, its on your system you have two choices:
1. leave it,
2. Uninstall it as you threatened "

I'm so ready to uninstall Avast."
@bob3160 Why would I want to do that? I would still get the latest version wouldn't I ?
The question already posed by myself "So its happened, why would you want to uninstall avast"
If you aren't having problems (and you haven't mentioned any) other than it having updated itself.
If you download the full off-line installation file when you know one is available and save it, you then have a fallback position to uninstall and use the off-line installation file to get back to the last version. Either that or do what we have suggested on many occasions, do regular system backups so you can go back.