This issue continues to frustrate me. I have updated my Avast repeatedly and it repeatedly tells me that I am up to date. I know that I am not because I am still on Virus definitions version: 17022101 and I continue to get the false positive. I am updating it using the Avast UI > Preferences > Updates > Update Now. Am I missing something? I’d really just love to check-out on Amazon and can’t due to the FP and every time I open Finder I also receive the FP.