the plugin author write a warn post after creating my post to post issue on their own site instead of here.
This is a fully cheat. They made plugin but not gave support here. They should provide help to people who use them or trust their software.
Edit on 14 July 13.
This developer never provide support or anything to help the user. They demand more and more money by threat the user about the blah blah.
If you impelement this script you find bunch of security hole. If you pay that developer they will cheat you more.
Before start using this plugin Call the idiot guys who made it. Don't blame me that I not tell you about this. People not write in this comment because they have cheated and have a bunch of big site and he can afford it. Who can afford idiot to pay lot of $.
Shame on WordPress to approve this plugin. How you can call it free :(