The built-in Syncthing library was updated to 2.1.5. So be sure to read about the major changes in 2.1 on https://github.com/syncthing/syncthing/releases/tag/v2.1.5 if you are using the built-in Syncthing library.
Full Changelog: https://github.com/Martchus/syncthingtray/compare/v2.1.5...v2.1.6
