Hi, Phil.

Since we don't have any information about you (like your email) we can't help you directly. You can use our automated system to have your license key emailed to you:

http://www.pingplotter.com/support.html#lostkey

Also, you can email our support team at support@nessoft.com and we'll be happy to help track it down for you (your name and the email address you used when purchasing are usually all we need).

- Pete