The Elektor Magic Eye EM84 (Jan 2010) 'AVR309' driver doesn't install under Windows 10, so I searched for another driver...
The USB driver 'libusb-win32' contains a test tool 'testlibusb-win.exe' which does recognize the Magic Eye in Windows 10 (tested with v1.2.6.0).
So I rewrote CPUshow for this driver.
The libusb-win32 driver can be installed by using its inf-wizard.exe tool.