Legacy 10 is 100% free and does not require you to unlock the deluxe features. If you are using Legacy 9 or earlier, do the below steps.
To unlock the Legacy Deluxe features please click on File on the menu bar and select Unlock Deluxe.
The Unlock Legacy Deluxe Edition screen will then open.
Make sure that I purchased the Deluxe Edition of Legacy is selected
Next fill in your name (any way you wish)
Enter your Deluxe customer number (you must include the dashes)
Next click the Continue button. You will know that you were successful because you will get a “Congratulations” message.