Hello Shaon, I am facing very strange issues in your plugin. By default All visitor option is there and I am not able to remove that so that I can assign it to fix groups.
I tried 3.8 version up to 4.07 and this is quite strange. I also tried it with disabling all plugins and set theme to twenty fourteen too.
Here is the screen shot and in error logs of server I also got these errors. Please provide me some urgent solution as this becomes a big trouble to me.
[27-Mar-2014 19:57:42 UTC] PHP Warning: Invalid argument supplied for foreach() in /home/gtouhdha/public_html/dustoutus.com/wp-content/plugins/download-manager/functions.php on line 2369
