[Plugin: Dreamgrow Scroll Triggered Box] No Theme option

Hi,
Your plugin looks just what I’m looking for, however, I am having problems getting it to work. I have installed it all ok, and gone into the admin section but I’m not getting the option to select a theme. There is a dropdown box but no options or themes listed in it.

http://wordpress.org/extend/plugins/dreamgrow-scroll-triggered-box/