In your case the avastSvc.exe entry isn't even present (unless that is to show you deleted it), so would be blocked. Ensure that your firewall doesn't just automatically block, but ask permission, so that it can be granted. Sorry I don't use OA, so I'm not familiar with its settings.
You could also delete all of the avast entries as I don't know why you have three entries for avast.setup as essentially there should only be one. Once you have done that put OA in learning mode or whatever it is called now and reconnect to the internet to create the entry for avastSvc.exe, also do a manual update as that should also get the entry for avast.setup.