Expander Gallery not showing as option

Downloaded Expander Gallery, activated it in Plugins, all set to go. But it’s not showing as a lightbox option and there doesn’t seem to be any way to get it to work. One type of lightbox only is working, no matter which option I pick. The theme used is BeTheme. If the plugin is deactivated, no lightbox effect comes up so it’s not a conflict with another plugin.