All upgrades are free.
For any version later than 2.1, simply install the new version. If the old version was registered, the registration will automatically be recognized, even if you have removed the old version.
For version 2.1 or earlier, you will need to contact us for a new registration code. Just send an E-mail to Support@SAFCoSoftware.com Please include the name and E-mail address you were previously registered under, and we will send you a new registration code.