Effective September 10, 2013, you must be a fully registered member of The LightZone Project in order to download the program. See the message above about registration.  Once the registration process is fully completed, including approval, and you have logged in after approval, you will see the download links for Linux, Windows, and Mac in the left sidebar---not the bottom right corner.   The program remains free of charge.  We are doing this now for security purposes and to better track the downloads and to help build the community.  It is fine if you do not wish to participate in the forums---no one is forcing you to---- but we would like you to participate and believe that in the long run a larger member base will be better for the project, especially in terms of attracting development support.  We do not think it is too much to ask that you register in exchange for free and quite interesting software.  We hope that you like it as much as we do, and will share with the community your experiences, questions, and comments.