On Win7 and updated USB 3 (Lenovo X220) first I got: “Object reference not set to an instance of an object.”
After updating to 0.8.15.767 (per above) I get:
“Tobii EyeX Server crashed with the following exception: Cannot set Visibility or call Show, ShowDialog, or WindowInteropHelper.EnsureHandle after a Window has closed.”
(this is like #844) followed by:
“Tobii EyeX Server crashed with the following exception: Object reference not set to an instance of an object.”