I installed a free version (2.1) to evaluate it.
It appears to allow file selection only through the standard browser Select File dialog, not through the WP-style drag-and-drop interface.
I haven't been able to decipher from the documentation whether the drag-and-drop interface is part of the free version, or if it is bundled into the $20 "PRO" version (http://www.najeebmedia.com/nmedia-file-uplaoder-wordpress-plugin-pro-v6/).
Then I see mention in the forums that there is a Flash dependency on the drag-and-drop, and that there is an "HTML5" variant available for a further $25 (http://www.najeebmedia.com/nmedia-file-uploader-pro/).
Can you clarify what is supplied mechanism for file upload? In the free version, is there any drag-and-drop? In the PRO version, is this using a Flash-dependent mechanism? Does one need the PRO version + HTML5 enhancement to get an HTML-based drag-and-drop uploader?