Never had this problem before.  The IoX launcher does not find the eisy.  On UD Mobile it connects, but using the IoX Launcher on my Windows computer shows blank.  I have cleared the Java cache and reloaded the launcher from the website, with no change.

From the UDI Wiki:

ISY Launcher cannot find ISY

• Make certain that you are using ISY Launcher. This is a MUST
• If you have VPN software running, Admin Console cannot search for ISY on your computer. Please disable the VPN, find ISY's IP address and then click the Add button and enter it manually
• Make certain that, after reboot, the pattern of lights is as described here
• If you have recently changed your modem/router, please follow these instructions
• If you have any firewall software, make sure it's configured properly
• If all the above have been checked, it's almost a guarantee that that your ISY is not on the same network as your computer. Perhaps at some point you might have configured ISY with a static IP address. Or, that your WiFi network is not connected to the wired network.

Turned out I had a similar problem once before.  A simple unplug the power and restart fixed it.