Hey Jonas,
my apologies for the delay in my reply, I was away without Internet access for several days.
If you want the header of your website to stay fixed on top when the page is scrolled (like in the theme demo), please make sure that the “Deactivate fixed header” checkbox in the “Header Setup” tab of the Theme Options panel is NOT checked. In case it isn’t and the header still does not stick to the top on scroll, please let me know!
Sincerely,
Andrii / Satori Studio