I thought this over again, and as juiceme said, noone really deleted anything

My first try would be to check messages-DB, but as we still don't know, where it is, second try would be to download tracker-DB (this works via Ariadne, as we know), check if there are still messages, if yes export them as CSV, try to put them in a format, N9QT can import them...

If there are no messages in tracker-DB, i don't see much, we could do...