Hey Mark,
Sorry for the confusion regarding the blank header. I have replicated that issue in my test site and it’s because you need to switch to the original header first before switching. The solution would be to install and activate Pro again and go to Pro > Theme Options > Header and switch to Original Headers. When you switch back to X, your Header Options would be available. I submitted this to our issue tracker.
Regarding your menu layout, I understand the frustration. This is because you need some extra coding. It can be achieved following UberMenu’s instruction for centering a logo and with a bit of custom CSS to hide X’s logo on desktop and show it again on mobile. I’ve set this up in your site and recorded what I’ve done to show you that it is achievable. It’s not that straightforward though.
Your design is not that easy to achieve with any theme in the first place unless the theme covers the exact setup you need out of the box. In other theme’s you will completely need a developer to build you the exact layout complete with back-end options so that it’ll be easy for you and your client to manage.
But, with the system available in X, you just need a bit of custom code. Just note that custom coding is outside the scope of our support. What I’m doing here is just to guide you or give you a head start with the layout. The the rest of the design and functionality that would need custom code should be handled by you or a third party developer. UberMenu has lots of features though so it would be best to check their documentation first if what you need is available before contacting a developer.
Below is the screenshot of your header layout now:
Desktop

Mobile

Here’s the recording of the setup. If you find it fast, slow the playback down or pause and play to follow along. Sorry for the lack of audio. The screencast is not a tutorial but just setup demo.
Regarding the particles and active icons, this is not available in UberMenu. You’ll need to hire a third party developer to add this bit of style/functionality.
To get the second level bar to appear all the time, you can enable one of the Show submenu options.
Hope that helps and thank you for understanding.