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.
Yes the current beta build under testing resolves this, if you aren’t happy with beta testing then you will have to wait for the regular program update on completion of the beta trial.