Downloading the Installer
Simply put, there isn't one yet. This wiki/faq/guide is for MAL Updater 2, and MALu2 is still in beta now, so you'll have to get it from the Beta Topic in the forum of the MAL Updater Club.
You'll have to download the file named App.rar from there and unrar it to a folder to your choice. If you don't already have WinRar installed (or any software able to extract files from a Rar archive) you can download it at the RarLab Website
More info will be avaiable for the installer when it becomes avaiable.