Hi guys, all solved thanks to a techy friend….I was on the right lines but would have been lost. His thinking is that the 3.6.1 download I did yesterday had been corrupted in some odd way. FWIW, the non running dt didn’t show in task manager but did in resource manager.
Mica, seems the D3S problem is known, I’ve hopefully uploaded a NEF which will get it taken care of…anyone on the dev team who needs another file, just message me.
Thanks MUCH for all help!