If it's not there, send a message to the address email@example.com and it will be resent to you within 24 hours.
The unregistered version has the same features as the registered version, but adds an additional "TWATERMARK-UNREGISTERED" watermark to the output images. You can directly unlock the unregistered version (after the purchase) using your license key.
Importantly ! When activating the key, you must an Internet connection to communicate with the license server.