This documentation is not using the current rendering mechanism and is probably outdated. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
Flash & user sessions¶
Make sure your pluploadfe template uses urlstream_upload = true when using feuser_required. See plupload forum post for more info: http://www.plupload.com/punbb/viewtopic.php?id=422