My b2evolution Version: 4.01 beta

Now that I have upgraded from 2.4.7 to 4.0.1, the Quick Upload plugin no longer works.

This is what I get:

Warning: Missing argument 2 for load_class(), called in /home/comicl5/public_html/plugins/quick_upload_plugin/upload_window.php on line 59 and defined in /home/comicl5/public_html/inc/_core/_class5.funcs.php on line 86

Notice: Undefined variable: classname in /home/comicl5/public_html/inc/_core/_class5.funcs.php on line 89

Fatal error: Class 'PluginUserSettings' not found in /home/comicl5/public_html/plugins/quick_upload_plugin/upload_window.php on line 60