wysiwyg releases 27 onwards can take Art-Net input directly without Wygalizer but you can still use
Wygalizer as well.
If you are using this on a machine not connected to a network you may need to add the
Microsoft Loopback Adapter which is a virtual network connection that allows connections to be made on the same machine without a network cable connected. The loopback can be installed using the
Add Hardware Wizard, instructions can be found
here (note in Windows 8 the driver is called
Microsoft KM-TEST Loopback Adapter). Once this is installed, disable all other network connections (wired and wireless) to ensure that the loopback adapter is used by both pieces of software; you will need to re-enable the network connections again before connecting to another computer.