I am having this same problem Please help!
My site designer is trying to activate the font upload plugin and is getting this message:
Notice: Use of undefined constant EDD_PLUGIN_FILE - assumed 'EDD_PLUGIN_FILE' in /home8/travenf3/public_html/wp-content/plugins/font-uploader.old/font-uploader-free.php on line 5
I contacted my host and they say it's not working because the plugin is only compatible up to wordpress 3.4.2 and my wordpress is 3.6. Then I told this to my web designer and they say (and I quote) "the demo is 3.6 and my own blog is 3.6 - the plugin isn't the issue the problem is with your server (hosting)
There isn't another plugin that does the same thing. I looked on the wordpress forums and one other person had this issue and its a problem on the server where the script couldn't write to the fonts folder."
Is this plugin up to date or is there another one? I would really appreciate a response as my site has not been up today because of this.