Save all of a solution under another name

In Visual Studio Express 2013 I want to save my current solution under another name, and have all the file names changed accordingly. Various posts in this forum indicate that you can copy the folder tree using Explorer (which I've done) open the project and manually rename the solution and the project (only one in this case). But this still leaves the subfolders with the wrong names. Renaming them manually leaves the project unopenable.

Is it beyond the wit of Microsoft to have a "Save solution as..." menu item?

Peter