STL plug in for SketchUp 2014

I have installed the STL plug-in to SketchUp 2014 and it shows in the “File” listing but when I want to “Export” the drawing in the STL format, it doesn’t give that as an option in the “Save as type:” In fact there isn’t any option listed. What is missing?

Don’t need to go to “Export” in the File listing, just go to “Export STL…” in the file listing.

The API currently doesn’t allow us to list Ruby extension exporters in the Export dialog - which is why we had to add that special menu item for it.