Spoke too soon - Nuendo requires the latest e-licenser, last year I had huge problems with e-licenser crashes and have been using the 32 bit version.
All well for 2 hours and then N10 quits in the middle of a mix down, followed by a series of e-licenser errors…
For now I’ve reinstalled the 32bit e-licenser and gone back to N8. Not sure if I’ll be able to use N10 without giving my computer an OS heart transplant