Download Reason CMS at GitHub.

Installation and upgrade instructions are included in the package. To get started, see the file README.TXT after downloading.

While point releases of Reason CMS are released every 6 months, the master build at github always maintains the latest stable release.

Alternately: Download the Reason CMS Virtual Machine

No setup required; just open the file in VirtualBox and you'll get an entire preconfigured machine with Reason installed and running.