* Updated top level file folder.
Previous, the structure was:
ZIP/models/<etc>
ZIP/materials/<etc>
ZIP/mapsrc/<etc>
Now it is:
ZIP/props_sphinx/models/<etc>
ZIP/props_sphinx/materials/<etc>
ZIP/props_sphinx/mapsrc/<etc>
If you have already downloaded and installed these assets in /custom/ in a folder of your choice, you do not need to do this again. Nothing changed with the assets themselves, just how they're packed in the zip.