[Dx4win] NEED HELP TO RECOVERY LOST DATA

[STU]

Can anybody give me some help to recovery 2 months worth of lost QSO's?
I went to make a country up-date (KC6 to T8) and lost 2 months of QSO's.
I have no idea how one had any correlation with the other.
My log reverted back to March 2, 2004.
No idea why it even picked that date.
Is the information on my hard drive somewhere and if so how can I get to it?

Any guidance would be most appreciated.

Thanks,
73, STU W6TA
w6ta@arrl.net