I don't think I made myself clear in the question. The thing is that my VS2013 project is a standalone project, I dont have any kernels folder, nor config.h file. I just built a VS project and included <embree3/rtcore.h>. Hence, I do not know how to enable backface culling.
As you use the precompiled binaries there is no way to enable the backface culling. Backface culling can only get enabled at compile time.
However, you could implement an intersection filter callback that achieves the same result, but at slightly lower performance.