[Dx4win] Global Removal of LCnf Status?

[Larry Burke]

Not sure how, but I have managed to show all of my FT8 QSOs as LoTW
confirmed (LCnf = Y) in DX4WIN. As near as I can tell, it's only the FT8
QSOs but I have not performed an exhaustive search to be sure other modes
are not affected. 

 

I'd like to correct this by removing all the Y's in the LCnf column
beginning with the effective start date of my current call, then downloading
the "Download Report" from LoTW using the same start date.  

 

Can someone walk me through how to easily remove all of those LCnf Y's in
DX4WIN using a given start date? 

 

Larry K5RK