Added some of the alternative formats suggested by Shadmar.

The 3DsMAX file is actually ok, it's a MAX2013 format file is the only problem as I don't think that anything else can import that, well, anything non-Autodesk, i.e: Blender.

These are FBX 2012, OBJ and 3DS format exports at least one of which can be used.

Worth noting that the collision square over the door needs to be disabled/deselected when the model is exported for collision.