Yes, I mean encoded/encrypted
There are no tools to edit the mesh- and mtl-location from all objects in the level by a specific algorithm like "Search & Replace" or so? The changes from the location of the texture files in materials is not the biggest problem, this are not so mutch, the problem are the entities and bruchs in the level.
It would be nice, if there would be added a feature to make some changes like this easier. I will now update all objects manuel. My level is fortunately not so large but large enough to have mutch work to do.