Finding and Interpreting an EDR Registration Level
If you purchased the EDR recently, the Key would have been emailed to you when you purchased the EDR. If you purchased the EDR some time ago, you would have purchased a “Ticket” and received the Registration Key when you registered a specific machine.
No matter how you got the Registration Key, you can see the Key by using Help-About from the EDR main menu as shown below

HELP-ABOUT location on the EDR Main Menu
This brings up the information panel, below, which shows the Registration Key. A center field of the Registration Key contains the Registration Level.

The single-digit field of the Registration Key contains the Registration Level.
If the level is 6, 7, or 8, the key will unlock the 2008 EDR. There is no need to upgrade.
If the level is 0 through 5, you may purchase an upgrade at a discount.
In the example graphic, the Registration Level is “5” which indicates a purchased 2005 EDR before January 2007. This registration key is eligible for a discounted upgrade purchase.
Very old Registration Keys have a completely a different format, like “EDR0101-198001001-CX”. These old registration keys are not eligible for discounted upgrade.
To purchase the EDR or an EDR Upgrade, please visit the EDR Store