Image Popup Not Working

Hi,

All of a sudden my pictures are not opening up in the popup form. I have “lightbox image” set in the “Thumbnail Click Opens” setting, but whenever I click on the images, it is now opening in a new window. Just started randomly happening this afternoon. This morning everything worked fine. Only thing I have done since then is make a blog entry on our website.

Any help would be appreciated.

https://wordpress.org/plugins/maxgalleria/