I cannot find any of the 1939 data that I've entered onto any of my trees (Roots Magic 6)worse still,one entire tree has gone

Surely this is a software problem rather than a more sinister reason (FMP is watching you!) I must say several times over the years I've opened a rmg tree and been surprised to find a lack of data information that I was convinced I'd previously entered. I've managed to find a gedcom file of the 'missing tree' but it was saved in January, therefore lacking lots of data entered since January.