Uninstalling Avast ... killing my iMac

I moved Avast from the application folder into trash but it did not uninstall it. What am I missing?

Thanks.

Here is the page for the instruction of uninstalling avast:

https://support.avast.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=1367&nav=0,56,59

It would be good to search the forum at first :wink: