From [this reddit thread](http://www.reddit.com/r/node/comments/2naeml/nodejs_tools_for_visual_studio_10_rc_released/cmcjfxv?context=2), the options to add new files e.g. new JavaScript, CSS, or HTML files is removed while the project is running: 
While there is no purpose to adding new server-side JavaScript files to a running server, adding client side JavaScript or CSS should be available without stopping the server, as it does not require a reload to be served.
While there is no purpose to adding new server-side JavaScript files to a running server, adding client side JavaScript or CSS should be available without stopping the server, as it does not require a reload to be served.