Its a great extension which makes life easier. For my work I need database integration in most cases. So, to store filenames in a database, together with a User id is essential.
The documentation in the pdf manual about this issue is not available. As a suggestion, it would be essential to add this into your pdf tutorial for those who need to save the file list in the database.
It is described in the last of the video tutorials, though.
As another suggestion, it is needed to rename buttons and error messages in different languages.