Hi Jack,
For some reason my reply to you seems to have oddly disappeared.
Are you running vers. 2.2.1, Jack? Was it working before and stopped?
I just tried 2.2.1 on my Win 10 PC to see if it’s happening for everyone. It opened and processed okay.
The only thing I really don’t like is that we’re stuck with only ProPhoto as the output colorspace. I know that wasn’t the only output option initially b/c I always use Adobe RGB for consistency and would never purposefully choose ProPhoto (wide gamut or not).
It’s been a while since I’ve used it for conversions. I also seem to recall that when I chose .dng as an output it didn’t behave like a “real” dng in Ps CC. But I may be forgetting wrt that.
BTW I moved this to its own thread as it diverged in the other.
No worries … I do not own J2R at all 
