SKP to DXF loaded but not working

I downloaded the skp_to_dxf.rsb file to: Library>Application support>Sketchup2015>Sketchup>Plug ins and still don't see an option to export to DXF when trying to export a Sketchup file. I'm working on a Mac Pro with Yosemite and downloading with Firefox. Any help provided would be greatley appreciated.

Forums: 

option to export

The link to the export to dxf plugin appears as a menu option (Export to DXF or STL) in the Sketchup Tools menu. (It does not appear as a option in the File->Export menu). Have a look in the Sketchup Tools menu,

all the best

Nathan