We highly recommend keeping your AQT registration key in a secure location. Your only record of this should not be an email, as emails can be lost or purged. It is a good idea to hold it separately from your machine so it is not lost should you have a hard disk failure.
There is no guarantee that your registration key can be retrieved, so make sure you do not lose it.
If you still have your old machine, you can find out the license key from your AQT running on that machine.
Go to an AQT SQL window and enter the command:
Email us this screenshot (or better still - go View > Copy All and include this info in the email). This will enable us to locate your license key.
The showreg command is only available for AQT v9.0.5 or later.
For instance, it may have died, or have been wiped before you had a chance to retrieve your registration key.