[Zubersoft]

The layer visibility is synchronized because I used to get many complaints when it wasn't, because users would sync their library between devices and the visibility for the layers was not updated appropriately. I understand that in your case, you don't want this. So the only way to make everyone happy is to have it as an additional option during the library synchronization. I'm going to try to focus on the library sync feature in one of the next updates, but I can't work on this right away.

Mike