This release adds a new “tutor” learning tool for helping new users understand compiler warning and error messages, improves compiler lint checks, fixes reporting of singleton variables in included files, improves the Windows installer, provides a workaround for recent SWI-Prolog Windows installers no longer writing registry keys, adds an AppVeyor script to build and make available a Windows installer per commit, adds new unit tests, includes documentation updates and improvements, improves syntax coloring of escape sequences in quoted atoms and character code number notation, and provides portability updates for SWI-Prolog. For details and a complete list of changes, please consult the release notes at: