Kumologica designer is now part of Kumologica SDK and available as npm module.
To install latest version of the designer run:
npm install -g @kumologica/sdk
For more information see: https://docs.kumologica.com/docs/guide/GettingStarted.html#installation
https://github.com/KumologicaHQ/kumologica-designer-releases/releases