HTTPS conflict with theme

Hi, I’ve already contacted the theme developer ‘AIT-Themes’, and they have said the issue of the header styling being thrown out, as seen below from the screenshot, is caused by a conflict with the HTTPS plugin.

http://screencast.com/t/aEoTjHQbjr

Can you let me know how to resolve this issue please?

Thanks.

https://ww.wp.xz.cn/plugins/wordpress-https/

[Moderator Note: No bumping, thank you.]