Portfolio Header Image

Hello Hardeep,

I bought the Pro version of Latte Theme, and I really like it in general!
At the moment I face some problems with the header image on the portfolio detail pages. Some days ago, I tried different options, one of them was a plain “image” consisting only of a background colour.
Today, I wanted to try several other things, but whatever I did (assigning a new image, removing the background image) had no effect. It stayed the same background image on the site.
Then I removed the image completely from the media library, and since then the Latte default header appears, but again no chance to change this.

What can I do to have the flexibility again to change background images?

And is there any chance to get rid of the header in portfolio detail pages at all?

Thanks in advance for your help.

Regards
Frank

Btw, I would find it helpful if there was a way back to the start page / portfolio overview beside using the menu or clicking the header.

The page I need help with: [log in to see the link]