The first step is to go to the Product page of the software you would like to download. For LPS, this is here. Note that all the products can be accessed by the product page, and are organized into general functions: Author, Manage, Connect, and Deliver. Clicking on a cube (e.g. Author) at the top will filter the product list.
Next, click the downloads tab on the right-hand side of the tab list.
After clicking the download tab, the content will change and you'll see a download link. After clicking on this you will be directed to log in. Please note that this log in only pertains to software download access, and you will have to register with some basic details.
After registering, an email is sent with your login details. After you login, you can go to the product download tab again and click on the download link once again. For LPS you will see a message saying that due to the large file size (~600MB for LPS) a temporary ftp login has been created for you and that you will be emailed the ftp location and login details. The email is sent immediately and you should receive it within seconds of hitting the download link.
Next, log on the the FTP site and download the software. Without a license LPS will work in "demo mode" for 30 days, but you can also contact your local representative for an evaluation license (or any questions). You may also contact your local representative for the software package on DVD.