3 years after the release of version 3 I thought, it should be made public, so everyone can take a look at its content.
The version is not protected. If the editor still crashes, then it's caused by MTL. I might upload a proper loadable MTL later.

Although this is an open source release, it subjects to some restrictions.

1. You may edit the map and release it as "new" version. However, the map name must be chosen that it has still a relation to the original one.
2. You may NOT copy the map or parts of it into other maps. (Excluded are ring-transporters which can be used as template for your own maps.)
3. You may NOT copy your map into this map to go around rule 2.
4. You may NOT turn the map into a sex map.
5. You may NOT edit the (texture) packages that are required by the map. (It's in your own interest if you don't change them) 

- Nobody