Ive looked everywhere for an answer to this question but have been unable to find a clear solution. 
  
When in a 3d view I do not have the option to export to anything but DXF or picture files.....no OBJ or 3DS export option appears.impor 
  
This is using Chief X5 
  
Importing DXF files to sketch-up does not work well so I was hoping to start using 3DS.