Attached Link: http://www.lm-software.com/mlcad/

Just in case you need a bit more control with your lego meshes don't forget this program to. It's slightly, like way more powerful than the program above but you still need the program above to convert the dat files to obj. Don't make your meshes too big or you'll have problems importing them into Vue or any other program for that matter. Best export it in groups with a master file for all the groups. That way if the big mesh is too big to import you can import the smaller groups and put it back togeather again In Vue. I mean big meshes. 1500 parts, maybe break it up to 200 parts where it will be easy to put back togeather again. I've managed to import 1500 piece meshes all at once but it took a long time and a few times it never imported. But it did import eventually.