Same problem for me. Long time not used and now it didn’t connect. Noticed last week the “pling” sound of connecting/disconnecting a usb-device, but I don’t noticed that this was the EyeX. Yesterday I delete all software und registry keys, make a fresh install with v2.7.0.5807 and now it is impossible to start btw. complete the calibration. Software tell me to connect the eyetracker or calibration screen close itself. System is windows 7 professional, 64-bit.