+ AA6YQ comments below
When I started DXLab this morning, Spot Collector came up with a pop-up with lots of text and Enter your callsign. I couldn't read the text as it was mostly greyed out, but I entered my callsign anyhow.
+ That window is displayed on startup when SpotCollector attempts to retrieve your callsign from the Windows Registry and finds it empty. The text displayed in black font on a gray background is
If you do not install DXView, up-to-date databases can be downloaded into SpotCollector's Databases folder from the Auxiliary Files column of the table in http://www.dxlabsuite.com/download.htm#AvailableReleases
(My excuse: I was doing this prior to my first coffee of the day).
+ Either you inadvertently cleared the the "Operator Callsign" setting in the upper right corner of the Configuration window's General tab, or Windows suffered a lost of information from the Windows Registry; check the Windows Event Logs to see if a hardware or software failure was recorded around the time this occurred.