Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
Hi
Have a look here and pearhaps, you can try the fix:
Regards
Michel
https://www.prepar3d.com/forum/viewtopic.php?f=6312&t=142590
. Will update if there's a recurrence, meanwhile awaiting the hotfix. 
