When you go to download the trial from the official website, it directs you to FilePlanet. FilePlanet actually says to click on a link to retrieve your 14-Day Trial Registration Code. Either you just didn't bother reading the page, or you are completely blind.

It directs you to this link:
https://secure.playonline.com/freetrialeu/

However, I entered an Australian postal code, so they put me through to EU, you'll have to look up the NA one if you live in America.