You need to run Repg 0040rxx-sailfish version on that but I wouldn't waste my time since RepG hasn't been updated since 2012 or so. Check this for reference.
http://www.thingiverse.com/thing:32084/#files

Use Flashprint to get going with or get Simplify 3D.

I worked on mater control getting it running but didn't like it.

The X3G is the same as the gcode unless RepG is incorrect and breaking it. Again RepG is out dated.