Downloaded avast free and installed 10.4.2232 over 10.3.2225, I used custom install, deselecting tools I don't use.
Note: the Program update is still being changed/set to Auto Update, that is bad - as I have mentioned before - as it can update at a time that isn't convenient.
The problem with XP Scanning HTTPS on yahoo.com appears to have been resolved, certainly the limited test that I have done.
The issue with doing a manual VPS update (certainly in XP) where it would cycle back to RED (unprotected) AMBER and GREEN bands in the UI also appears to have been resolved (getting late here).
Will continue checking tomorrow.