The latest release has a problem and will not run. It is no longer advertised on the website, but until we can get it removed from the server, Glyssen will offer to upgrade automatically. If you have already upgraded, please remove that version and re-install version 1.2.2. We apologize for the inconvenience and hoe to have this problem solved soon.
Version 1.2.4 now fixes the problem. Note that starting with this version, Glyssen requires .NET 4.7.2 or greater. This is a free download, but it is not bundled with the Glyssen installer.