I don't have this software. Most likely it's registered in an add-on.xml file in C:\Users\Your Name\Prepar3D v4 Add-ons\Fairbanks?
If yes, make a backup, then delete this folder.
Then add the scenery the "normal" way via Lorby-Tool. First "Move to add-on.xml" and submit, then "Move to scenery.cfg and submit.
Isn't this posssible?