From his documentation:
File Sizes - for multifile operations and due to the limitations of modplsql the plugin will only behave efficiently with relatively small file sizes. This is because the file needs to be base64 encoded before transmission and split into an array of 4K chunks. Browser memory consumption also increases during the file transfer operation so larger files translate to larger memory usage. That said, the plugin should still support large file sizes of 10MB+
Probably best you contact Matt directly since this is a commercial plug-in.
i send the massage to them(Matt),still no reply from them,anyone have experience for this functionality covered with licensed version plugin? or any other tools available for uploading files?
my setup at item Settings..
but its not uploading properly! failed!