Save button grayed out in evaluation version?

I'll bet it's a Marketing feature, ensuring you have to purchase it if you're going to benefit from its functionality.  At worst, you can make screen shots of the views you've created so you can share them with your team or your Manager.  

But for now, unless someone shows otherwise, my money's on that being intentionally disabled because it's only a trial/demo version.  From a practical point of view, if it weren't disabled, some people might not find incentive to purchase it.