Releases are maintained at GitHub. The full list of releases beginning with 4.2.0 is available at https://github.com/esdscom/sdscom-xml/releases.
Former SDScom Releases (prior to GitHub)
The following covers just the latest of SDScom version 4.0 and 4.2. There never was a version 4.1, and version numbers prior to 4.0 were assigned to its predecessor EDASx.