Black Caption Backround in Lightbox

Hi to all,

The Modula Image Gallery is really amazing thanks a lot for developing. I purchased the license key für Pro, where I can change the background color from the Lightbox. Now I changed it to white including the image title, which I would like to keep.
I need to change the black color gradient title background at the bottom, to rose color gradient and keep the white caption.
An alternative would be to change the caption background completly to white with rose caption.

Can you give me a hint where to change this setings?

Thanks a lot!