I asked for help, as the exporter/importer download link is down, and someone answered me!
He put a link in the "Shout There" Box with the exporter of the official blog ( http://hardpcmtechnologies.blogspot.com/ ). I don't want to overload his server as it's a temporary solution, so I will attach the file here.
Of course, the alternative download link is placed in the "Shout There" box.
I am testing it right now. I am exporting a sketchup file to .obj format in a very complex model. I hope it can export textures, too. So the zip is untested now.
I will tell you the results.
Thanks a lot rog! I link your page:
http://rog.gameslate.com/
Edit 1: I am trying to import .obj and .ase files to blender, but there is a python error. I believe that, in theory, .obj is exported with textures. Is the problem due to my Blender? I continue testing.
Edit 2: It can import in sketchup the previously generated .obj files, without textures.
Edit 3: .Obj files imported in Blender with other model. Probably a problem with blender's obj importer regarding scale. No textures, I believe now that are generated in a separated folders for .obj files, and there is not such folder.
HSKP2UNR_v089.zip