A little thing that I think would be useful. The main window's QSO tab has the buttons Sync LotW QSOs and Sync LotW QSLs. Clicking on either brings up a window that asks " . . . do you wish this filter removed . . . ?"
The choices are Yes or No. On several occasions a Cancel option would have been useful for me as I had the wrong filter or the sync operation was simply the wrong step at the time.