Marking as answered, See Jesus' follow-up comment to read how he solved his particular situation.
While looking into this I ran into something that may be causing some similar headaches if you're testing the provided sample scenes in Unity2017.
You may run into the issue mentioned in the release notes regarding projects built with older versions of unity. The examples packaged with the plugin are targeted for 5.4/5.5
Because of this, the examples won't build to a standalone properly out of the box for 2017, you'll have to delete the camera being referenced by the zCore and replace it with a fresh one.
If you're still having troubles, I took the time to construct a project in 2017 with the proper player settings and replaced cameras in the example scenes.
Here's a zip of it to test out.
2017 Working Sample Project