I have developed a small app on the fly.
ModelLibChanger scans your community folder for the wrong modelLib.BGL and offers you the possibility to rename them and adjust the layout.json at the same time. I tested this with a few airports and landmarks, but I can’t guarantee that it works with all (wrong) add-ons. Backup your community folder before using.
Should be available on Flightsim.to in a moment: