The major features of each release of PhixFlow are described in release notes.
Each release is given a version number like X.Y.Z where X.Y denotes a major release with significant new functionality and Z indicates a patch release, usually to provide bug fixes between major releases and early releases of new functionality.
Release notes for versions 5.9 and higher can be found on the following pages:
Release notes for previous versions can be found in the Release Notes Archive.