Hi Francky! The problem is that our Joomla plugin doesn't yet have the latest version of the core 3d product viewer that is integrated into the desktop publisher (SpotEditor).
You can fix this by uploading the imagerotator folder from your published project directory (it's located under 'published') to the following location on your Joomla FTP, overwriting the existing imagerotator folder there. It's best to backup the old imagerotator folder before overwriting it, and please don't delete the old one, just copy the new files over.
If you need help with this, just let us know via email (we would need your admin and FTP login)