There are installers for both Standard and Plus there. Make sure to download the correct one you have a license for.
We're still in the process of transitioning to the new website. Our webmaster isn't putting in anymore time into the Drupal 6.X that the current Accounts side of the site uses. 100% of the time invested is going into the new WordPress site design. The sooner we begin using the new website the happier I'll be. The current site does not properly convey what Nthusim is.