I bought the plugin, cause it was exactly the galery style i wanted to have.
After installing it, i noticed a poor performance while uploading and editing files.
then i had the overkill error: i couldnt insert shortcodes in posts or pages, so the plugin was useless.
I wrote in the support forum, but there wasn't an answer for weeks. not even a short "we work on it" message...
The solution was this (found it out myself after long trying...):
The plugin is NOT compatible with the MP6 plugin which changes the backend view.
After deactivating it, the easy galery plugin works.
Still a bit poor performance, but i can insert the galeries.