As of July 18, AIS version 7.0.1456, after auto updating defs to 120718-0, the Avast Outlook 2010 64-bit plugin asOutExt64.dll fails (please see attached screen capture), I have run the Avast installer repair, but no effect. There are no errors posted to the Windows Event logs.
It appeared that all Outlook 2010 64-bit plugin failures had been fixed a while ago, but have somehow been reintroduced 
I will be happy to supply the info required to get this working again.
Thanks,
Frank