As your object is a wire it's a little tricky with all these free progs

Try this :) Sketchup Make is free! http://www.sketchup.com/products/sketchup-make

Export from Moi in format SKP

Reload the SKP In Sketchup - Scale 1000 : Export from Sketchup in Format DAE

Import the DAE in Blender V 2.75 (mine) : a nightmare! :) http://www.blender.org/
Press A (= Select All)
Press Edit Mode (bottom left screen)
Make Edge/face (Middle left screen)

From Blender export as OBJ (Menu File up left screen)

From MOi: _importObj (by Max Smirnov)
http://moi3d.com/forum/get_attachment.php?webtag=MOI&hash=196c71c0e707b0c68f267a376fa30df3&filename=ImportObj.v.1.5.2015.09.10.zip

you have your elephant format 3DM in Moi as a unic solid! :)

But the EdgeLoop selection will be not very useful!
You will only select a face one by one! :)

http://moiscript.weebly.com/uploads/3/9/3/8/3938813/elephant_solid.zip