@ Dix Huit
You might want to update to the latest version (just released) as that also has the option in the avastUI > Settings > General > Enable avast email signature (disabled on mine by default, not sure if that is inheriting my previous settings).
Thanks, I always like to stay up-to-date. I have managed to disable the webmail “note” on the current version thanks to the information provided in this discussion :).
You’re welcome.