I am running the latest version in Demo Mode (A friend has an old license key, but I wanted to test it first), but it doesn't say on the website if Artnet is enabled within the demo or not. But It should be working, because it's not grayed out or anything.
There is a window which shows the current dmx values for each universe, but it never showed anything there while I was testing.
I asked google about it, but couldn't find anything.
I tried the student edition and it works fine over ArtNet and CITP which means the problem is caused somewhere within Realizzer.
Thanks,
Tim