Use of undefined constant EDD_VERSION – assumed 'EDD_VERSION'

I had a problem with admin side of WordPress very very slow so I searched online and found this article on WordPress Performance
http://wp.tutsplus.com/tutorials/scaling-caching/how-to-analyze-your-wordpress-installations-performance/
I installed all plugins and did the debug true and I got this message.

Notice: Use of undefined constant EDD_VERSION – assumed ‘EDD_VERSION’ in /home/webconte/public_html/wp-content/plugins/easy-digital-downloads-csv-manager/includes/class.exporter.php on line 51

Notice: Use of undefined constant EDD_VERSION – assumed ‘EDD_VERSION’ in /home/webconte/public_html/wp-content/plugins/easy-digital-downloads-csv-manager/includes/class.importer.php on line 52

At the top of the theme
The preformace looks like its the theme I will take that to the theme developer. but the error I woul like fixed

http://wordpress.org/plugins/easy-digital-downloads-csv-manager/