I uploaded and published a gallery here: http://2014.taichi-dragon.de/galerie-2013/
I do not see thumbnails, but can click on the white rectangles and see the pictures. what am I missing?

Dear customer,

Please delete the images from file manager, upload them again and publish again. Most probably your thumbnails have been deleted. If it doesn't fix your issue, please give us (to [email protected]) admin access to your site, by indicating the forum post link in your email subject and we'll look into your issue as soon as possible.

I uploaded a folder with the used images via FTP as to have a cleaner structure on the server. If I upload them with the manager they all mix up with other pictures. is there no way to create the Thumbnails in the backend?

Dear customer,

Unfortunately our plugin doesn't support FTP upload yet. But we are planning to add this functionality in future updates. Please use our File manager instead.

Thx for the information. Than this Plugin is of no use for me now. Will check it out later.