Wow it doesn't look anywhere near that nice when I open in Meshlab. Mine has black triangles all over it. I'm sorry it turns out the PLY problem is not a bug, I was using an STL importer for the PLY file.
If you want to try loading an STL file ( I exported from mine MeshLab) you can download the LightWave importer script from here:
http://www.chromecow.com/To run the script open LightWave Modeler and go the the Utilities tab across the top, then along the left side click LScript and load the
SHM_STL_Importer_v1.12.ls file from the download. There might be a polygon count limitation on the LW trial version though, I'm not sure.