Believe it or not, even though the idea seemed dead, I've actually got something to share - a complete, functional, cross-platform app. I'm looking for a couple leagues that are running regular real-time sims, and are willing to be early beta testers, to try it out.
You'll need to contact me for the download link for the app, but there's a web page with details, and config instructions at
https://statsplus.net/desktop/
I've been using this app with my personal league for almost two weeks to create better real-time sim HTML and integrate highlights with Slack, and I've tested it on Windows, Mac, and Linux.
Looking forward to seeing if we can get others that are regular real-time sim users going.