The Community edition of Visual Studio does indeed support Visual C++ Cross-Platform
Compare Visual Studio 2015 Offerings

Does Community 2015 contain prerelease version of Visual C++
Cross-Platform with a terminated license?
The version your currently using, isn't the current version of Visual Studio, so it is not shocking the agreement has expired.
All Visual Studio updates can be found here
Since the website is less then straight forward.

It requires a picture diagram to explain

Here is just the update 3 .ISO

Important Notice
As of early 2017 the Visual Studio website was changed. While the contents of this answer are correct (due to the screenshot), the layout of the actual online page has changed, which means only the current version of Visual Studio can be downloaded at this time.