OK - so I have figured out: the LoTW ADIF extract from DX4win, the ARRL certificates, signing the ADIF file, uploading the file, downloading the matching QSO confirmation results, and importing the results into DX4WIN as "upload confirmed QSOs".
I uploaded 15,761 QSOs to LoTW. I got 1,962 upload confirmed QSOs in response. All seems good, except the "upload date" is still blank. Is the upload date supposed to be filled in when I created the DX4WIN extract ADIF file, or does it get filled in when I import the "upload confirmed QSOs"? In other words - it DX4WIN's "upload date" tracking when I _sent_ the QSOs to ARRL's big database, or when I _receive_ a confirmation that one of mine got a match? And... what action on my part actually enters the date? {please don't suggest that I have to hand-enter 1,961 dates... ;-} -larry K8UT