I've installed this plugin on my wordpress site new.fibis.org and install seems to have gone well except when I make changes to the button size it won't save and the buttons are a little large for my site.

Dear Fibis

Please give us a link to your site and temporary admin user account, and we will try to find out the problem as soon as possible.

Best regards
Web-Dorado team

Don't worry. Problem sorted. I thought you could alter the size of the default zoom in the free version. I've upgraded to Pro and all works fine now.