Besides using the download button on contao.org, you have been able to download Contao via the domain download.contao.org since 2012. But now that we have two LTS versions in parallel, we had to adjust the download API.
Contao version 3.5.29 is available. The bugfix release fixes several issues including a problem with displaying multi-day events if the "shortened view" option has not been enabled and a problem with combining style sheets with unencoded data: URLS.
Contao version 4.4.5 is available. The bugfix release fixes several issues including a problem with the install tool and a problem with SVG images in the Internet Explorer. In addition, the back end theme has been adjusted again and some of the previous changes have been revised.