Hi @dfinch,
Yes, may not be sorted out soon. ConvertPlus has its own responsive offset, so does the theme which will be harder to integrate both unless ConvertPlus will have a feature that could integrate external offsets. You can see this feature in Revolution slider where you can assign an offset or offset containers to create negative space and to give room for the header for preventing overlaps. But, it’s not something available in ConvertPlus. I love to see this feature in ConvertPlus too but it’s not our plugin.
The header fixed positioning of our theme is just using standard CSS position: fixed; so it shouldn’t have any problem. But it does because the plugin lacks the offset feature like in the Revolution Slider. And to list down the feature,
- Revolution slider has offset option

- The Pro header also has offset option

Which of course, just named as Margin Top but it’s actually Top since it has Absolute position (https://www.w3schools.com/css/css_positioning.asp).
But they aren’t connected to ConvertPlus offset as there is no similar option available in it. BUT, with the above screenshot, you can set your header position to absolute and set its Margin Top equal to the height of your ConvertPlus height (like 50). That should push the header down about 50px reserving a space for ConvertPlus. But again, since this space is given by the header and not by ConvertPlus, closing the ConvertPlus will not remove the reserved space.
And to use non-floating header, just turn off the Sticky Bar option in your header bars, just in the screenshot above.
Thanks!