The installed distribution is easily updated via the symbolic link
ln -s /usr/cygnus/progressive-release /usr/cygnus/progressive
Each time you install a new release with a similar configuration, you only need to change this symbolic link to give your users access to the new version of the toolkit. You can also revert the change by switching the symbolic link back to the previous release if needed, as the previous release is also still available. Once you decide to keep the new release, you can remove the old one to conserve disk space.