@Davebobman, I did everything as you described, but 188.8.131.52 still didn’t work for me.
I never connected the eye-tracker to my pc, I always connected it to my 8KX with the cable shipped together with the eye-tracker.
I even made sure to connect it the “right” way. (If you connect it the “wrong” way, the connection is only usb 2.0, not 3.0. If you unplug one end, turn it by 180° and plug it in again, it’s 3.0 again. I didn’t believe it at first when I read this, but I checked it and it’s true…)
I also used AMCAP to check the connection. It says I get 118Hz at 640x480, so connection is fine.
At first, I installed the driver through Pitool, it installed 184.108.40.206. But calibration didn’t work, green dots disappeared after 1 sec. I uninstalled 220.127.116.11 and installed v18.104.22.168 that ryouma provided, and then I was finally able to finish calibration. After I reinstalled v 1.0.010 it stopped working again. I then tried the trick with the config file that IG88 provided, and I finally got a working 22.214.171.124.
I understand this might differ from user to user, but this was my experience.