The last time Avast AV was able to update automatically was the day I downloaded and installed the latest version of CFP.
It is possible I checked something like block instead of allow when Comodo was going through the initial list of programs it complains about.
Looked through menus and did not find where to find and fix.
I have been using CFP for over a year and am generally pretty pleased with it. It does not seem to remember what I have told it is OK, though.
Thanks