A suggestion to Elise B and Frank Knarf; If you write a review it's a good thing if you know what you're reviewing. McSerialnumber is NOT an application to store serial numbers for applications you bought. McSerialnumber is a tool for developers to implement serial number protection to their applications. It looks very easy to use and it's a very good alternative for the developer who doesn't have time implementing his/her own system for protecting the software. Good work. I'll order it straight away.