Hi William,
Thanks for your offer and sorry I didn’t reply earlier…
Shortly after my last update (january 22nd) I tried going back to driver 3.3.2 again. After reboot update to 3.5.1 was suggested (again) by Blackmagic Updater so I did and then… Everything finally worked. I’m 100 % sure I tried this before and more than once, but anyway. It works.
Strangely enough, after that I noticed several preferences were gone on my MacPro and not only in FCP. Weird, but since it’s not too serious I try to ignore it!
good luck there and try to ‘downdate’ once more…