But so far Cookie4 hasn't stated what avast version he is using.
I am using the free version, 20.1.2397(, build 19.8.4257.etc. ...)
Strange as I have just manually installer avast 20.1 (see attached signature below posts) over my installation of 19.8 and my previous settings have been retained, e.g. no signature added to emails.
EDIT:
Seeing your build number, it doesn't correspond to that of avast version 21.0.2397 the 19.8 corresponds to avast version 19.8 did you happen to copy my old build number, not that of your about avast details (see attached inage2) ?