Thank you for your answer Darren,
I tried the driver you suggested, reinstalled Tobii software…
… but problem was not solved…
EyeX is recogniced, Tobii Software says “Please set up the displayconfiguration”…
… when I do so, I get roughly 5-10 seconds of the windows 10 “circle of waiting” after that Tobii window closes, and it is as before I clicked the “Eye with the !”