Inline content sixth element

Hi there, I have a problem adding a sixth element in a inline-content and when I go to settings –> inline-lightbox settings, allows me to display only 5 items, how to add a sixth element?? is possible??

You can see the differentss button in this page when you click “Prepara tus compras” you see the sixth button not display.

Thanks

https://wordpress.org/plugins/lightbox-plus/