MVC Context Menus Missing

问题:

I've been following this tutorial http://www.asp.net/mvc/tutorials/mvc-5/introduction/getting-started on MVC 5. I've got as far as trying to add a controller, and when I right-click on controllers and choose "Add", I don't get some of the options in the picture - e.g. "Controller" or "New Scaffolded Item...".

I'm using VS 2013 Professional, and have uninstalled and reinstalled, tried repairing the installation, all to no avail. Has anyone got any ideas?

Thanks in advance