Annoying Interruptions and Ads

Even though I have purchased the program I want, I am still interrupted with messages about updates and offers to buy other Avast items. I did not purchase to be constantly sold other items. Although I think Avast works, I am looking for other alternatives.

If you have a paid version of Avast then you can disable the popups in settings.

AvastUI > Settings > Popups > uncheck the ‘Show popup offers for other Avast products.’

Yes, but even then, more interruptions appear.

If you remove the checkmark in front of the pop-up setting, you will not get them.

Have you stopped and restarted avast or rebooted since changing the settings ?
Have the settings been retained ?

Can you post a screenshot to give us an idea what it is you are seeing.