Items per row

Hello,
I just downloaded the free version of your plugin and I am trying to get 3 items per row in my flip box(style 5).
According to the Tube video the 3 photos should show in the preview box(at the bottom of the page) when I select this option, so that I can edit them and upload my own photos….
But there is only 1 photo showing in the preview and I don’t know how to add the 2 more photos on this row.
Can you please help?

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