Guild Wars 2

Ok, after doing some major digging for an answer in the forums, I came across this answer:

You can purchase the Digital Deluxe upgrade for both Standard and Digital Editions of Guild Wars 2. To upgrade your account to a Digital Deluxe Edition, follow the steps below.

Log in to Guild Wars 2.
Go to the Black Lion Trading Company Gem Store by pressing “O” (the default hot key) or by clicking the lion head icon in the upper left of your screen.
Select the Upgrades category on the Gem Store home page.
* Select the Digital Deluxe Upgrade item and click Confirm to purchase.

Please note that once your purchase is complete, your account will be upgraded the next time you log in to Guild Wars 2. Once your account is upgraded, you will receive an in-game mail message with your items attached.

However, what concerns me is the word purchase. How do I know I won’t get charged for doing this action? Will it automatically know I’m a new user and give me the DDE free or will I get a charge on my credit card for what ever the original upgrade price is?

I received the game for Christmas. The physical cd in my stocking. Do I qualify for the free upgrade for the Digital Deluxe Edition? Or is that upgrade only for those who purchase the game through the GW2 Website? If I do qualify for it, should I load the game from my cd or should I download the game via the GW2 Website?