Updated the original post with new downloads based on Chrome 78 (NW.js 0.42.0).
Note: local file/folder saves are experimentally supported in the Chrome browser. Once that moves from experimental to enabled by default, there will no longer be enough unique features to justify the desktop downloads, so they will be retired. This will probably happen next year. I'd recommend switching to the browser version already if possible - see the linked thread for information on using local project files/folders in Chrome.