As already mentioned in the other post, nDisplay runs fine with a compiled project.
Your config file should be irrelevant here - if it works in the editor, it should work when compiled.
However, from the screenshots it looks strange: Your screens in the component viewer are for some reason static meshes? Are you sure your config is working fine?
I would try running the nDisplay example config and see if that works, I think there’s a twoscreen setup in there.