I still use it very often and have a lot of love for it.
Ive found that Artnet output in FS can only do 1 of the 2 universes (that bit seems like it was never finished off?) and seeing other are struggling with Artnet as well, Ive written an app to convert sACN to Artnet. This has solved my problem so it may well help others out as well.
The solution is to set your output device(s) universe(s) to sACN (1 or both) and run my app to capture the data and spit it back out to your Artnet nodes.
Its a reasonably simple app that requires no drivers and its a portable app so no install required, it just runs (Ive got an install version as well if you want that?, both are on the webpage)
Anyway I proved it all works and it works really well but I cant post it here because its 70mb and the forum limits uploads to 10.
The app is written in JS, HTML/CSS and built as an Electron app (simple and honest) It will work for any sACN enabled package so not just FS.
You can grab them from https://sacn.leejamesapps.co.uk - As this is a cheap indie app its NOT code signed so some browsers / virus scanners will block it, or you might get the 'Don't Run' popup. I promise its safe to use. Let me know if this worked for you or solved a problem.
Best
Lee