All data is stored on your computer in a cookie. Keep in mind that many things can delete cookies so don't store anything in the notepad for too long. It's just meant for quick cut 'n pastes.
How the cookie appears will depend on your browser but should have the words "psifly" and "notepad". You can open it with any editor and read it as plain text if you need to ... it's unencrypted.
The cookie is set to expire in 90 days but can be changed to any numerical value you like. There are two special values that can be used "f" will set the cookie to never expire and "r" will remove the cookie erasing any data that was present. Also setting the value to zero ("0") will delete the cookie when the window is closed.
- Credits -
The script essentially comes from http://www.anyexample.com I wrote the equivalent one in perl but this is just much better than mine.