When adding a Virtual Device, I can get MyDMX 3.0 to connect to my Art-Net device, after pressing OK, saving the scene, and then restarting MyDMX, it forgot the IP of my Art-Net device.
I have send you a mail with a link to the video.
In the video I tested with the Jan. 31, 2018 version. I tested with the Aug. 2, 2018 version too, it got the port number bug fixed (as changelogs also says), but IP is still changed to 0.0.0.0 on next program start.
Also, if the subnet is changed, it is also changed to 0.0.0.0, leaving it unchanged will make it persist after program restarts.