Product Release Versions
Find here all release notes for previous versions of Cloudify.
If you are trying to download versions before 5.1, please contact us.
Cloudify 6.4 Release Notes
Version 6.4 can be deployed as a new installation, as an in-place update over a 5.2.x/6.x.x Cloudify manager and as an upgrade version for any supported previous Cloudify release. See the upgrade section for more details.
Release note link