[Dx4win] LOG_PROBLEMS_IN_DX4WIN

[G]

I am having a problem with somehow, over the past week or so, the "upload date" got populated in 100 or so QSO entries??? I don't use this and now my DX summary shows an "S" instead of the "C" for confirmed I would like, and have been use to seeing in the past.
How can I delete the 1000 or so contacts "upload date", that all show the exact same date without disturbing any other entries for these 1000 or so contacts.
How in the world did all these contacts get populated with the same date? I sure didn't do it! 
I have been using DX4WIN for over a year now without this problem.
I set the "upload flag" to "N" with no help, the upload date remained.
I can't see me deleting this entered date one by one.
Can anyone help?
Thanks.
George