yes, it can import .e57 files. I have a sampple .e57 file I got online of a little bunny ( rather than the huge 3GB file I really need to work with) and it imports fine and I can see it. The problem is getting it to a mesh. the .fbx and.obj export option produce a file but it is empty ( 6k). Very helpful tech person informed me: "The problem is that the only geometry type E57 supports is points, which is not supported by either OBJ nor FBX. You need to convert the points into a mesh object so it can be exported by FBX / OBJ. Transforming a point cloud into a mesh is not an automatic process. You can use a few plugins to achieve this:
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I looked at the first link and the demo ( which is pretty cool) and is fine for the bunny file. but NOT a 3GB scene file. that looks like it would take forever and a day