Update Dynamics GP web references

I am trying to update a web service project that was previously built with GP 2010, to GP 2015. I have made the new Service Reference class, and a WebService.svc to interface with it.

Here is my project structure:

Navigating to http://localhost:48620/DynamicsGpWebServices I get:

svcutil.exe http://1bqryz1:48620/Metadata/Legacy/Full/DynamicsGP.wsdl

And navigating to http://localhost:48620/Dynamics/gpservice I get:

svcutil.exe http://1bqryz1:48620/Metadata/WCF/Full/schemas.microsoft.com.dynamics.gp.2010.01.wsdl

To me, it looks like DynamicsGpWebService is running the legacy .net 2.0 ASMX references, and that the second link gives me the new WCF references, however it is still pointing to GP 2010.

Looking through the project and online I can't find any way to update the GP version it is pointing to. I have GP 2015 installed, as well as the web services run-time.

Am I missing something here? Any help appreciated.