After updating to 7.0.1466 Sent items work perfectly. However DO NOT click on any or the subject line changes to the last SPAM email received I think. However, remove the add in and all works perfectly so the corruption is 100% caused by the add in.
As before, when I report a problem Avast ignore it!! I classified it as an Emergency because I am using this for business and losing the subject lines of all my Sent items.
I am due to renew my license but refuse to do so when such a critical bug exists and remains unanswered.
John Fligg