Well, this is it: you don’t have to trash the preferences. The bug is not in the preference files, it’s the EuCon connection (2.7.1). Even without a session opened, if you have the EuCon active, it crashes on quit.
Workaround: close the EuCon program BEFORE closing Nuendo.
no problem here with Eucon 3.0, no need to restart Eucon (make sure only one network- the one connected to the board, is active), and finally the scrolling wheel in working on ALL edit windows.
Same as Shauli here, no need to restart Eucon. In fact, at the risk of sabotaging myself, 6.06 in 64 bit w/Eucon 3.0 is super stable so far. Building up a 50+ track show, no FX or automation yet, will report back. john.