Ok, so, what its doing is after you say yes to "Mark exported log records as sent to LoTW?", the next pop-up is "x Records marked as LoTW Sent", if you click on OK (the only choice) it pops-up the "ADIF Export Options" window, same as after you hit the "Export process and upload button in the "Upload QSO's to LoTW" window. Now, if you do nothing when the "x Records marked as LoTW Sent" window pos up (i.e. dont say Yes) but leave it sit there for a couple seconds, that window closes on its own. Dont remember it doing that before, but maybe I'm to quick on the trigger to have waited.