SolidWorks URDF Exporter not Working

Hello, My current system is x64 win10. SolidWorks 2015 x64 is installed. I could do the exporting when I used to use Win7 in the same machine.Now, the exporter shows up in the extensions, but not in the file menu of the assembly. My previous OS was English, stating it just in case.   Thank you for your time