You download the latest version from Nuget.
From http://blogs.msdn.com/b/adonet/archive/2013/10/17/ef6-rtm-available.aspx:
we are also publishing an EF 6.0.1 patch on NuGet today. If you install from NuGet you will automatically get the latest patch version. If you use a VS2013 project template that already has EF6 installed, or if the EF6 tooling installs the NuGet package
for you, we would recommend updating to the latest patch version. You can do this by running Update-Package EntityFramework in Package Manager Console.
Visual C++ MVP