[David S5 Fusion]

Thanks Eddie,
Yes, uninstalled both the Hybrid and DSP Pilot using the uninstallers as described. Also (to be sure) deleted all content in corresponding locations, then copied back the Hybrid authentication file. Installed new versions AFTER installing eMix 6.0.3. Tried this for several times as I had the same idea as you. I am absolutely sure the last shipping Hybrid app is running on the SC264.

Also tried to start eMix 6.0.3 before installing the Hybrid app, just to make sure there is no other instanse of Hybrid running on the SC264.

As written earlier on, I have tried installing the new EuconWS app on a brand new workstation running Win10 pro. New workstation then shows up in lower garage on CM401, but Eucon fails to connect. Downgrading to previous EuconWS app, Hybrid connects also with new workstation.