I’m pretty sure it’s not in the images folder. I did try first deleting the image, and then I just got the overlay on a blank background every few page loads. I can’t find anything relating to the overlay itself in the style sheet attached to the theme.
There is some php code in functions.php that is relating to the overlay, which is part of the theme, but with my limited knowledge I don’t want to just start deleting lines of code.
I’m not sure if I need to change something in the stylesheet, the plugin options or the php code???