I had the same problem. Ivan's talking about the "Deployment Target Version" setting in the project (not solution) properties in Visual Studio:
Right click on the project and select properties.
Click on the Configuration Properties on the left-hand tree.
The "General" tab has a single option: Deployment Target Version. Set this to SQL Server 2012 or 2014, and then the Cozyroc components should be visible when you reopen it.
Hope that helps! -Lane