Some time ago i bought Simple Image Gallery Pro. I installed it on a joomla site and it works perfect.
On another site, for someone else, I want to install Simple Inmage Gallery (plugin) free. But there is a problem. In an article I only see {gallery}myfolder{/gallery} . Not the thumbails or picture(s).
When I uninstall this version and install the Pro version on the same site, It does work.

What could be the difference between those two versions, the Pro or the Free?