DavidR
3
You don’t say what it is that you want to exclude or why ?
If these are files (?) that you consider avast is incorrectly alerting on, the best policy is to submit them to the virus labs for analysis and correction of the signatures. That way you don’t require an exclusion for it and it could help other avast users.
Excluded files or URLs as such can’t be imported, only entered manually, however like most things in life there are workarounds, but they aren’t simple either.
They are mostly preserved in the various .ini files of avast. Having identified what it is you want to exclude, you could add one manually in the various shields or settings, check the .ini files and see where the data is stored and in what format. Then it would be possible to manually edit the .ini file inserting the exclusion/s.