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Thanks Kirk - I had already tried that but tried it again and it still doesn't work. I even quit Photo Mechanic after saving the change in the preferences and it still didn't work. The RAW file has a purple colour class (cmd 1) and when saved the resulting JPEG still has no colour class. I am starting to think that this is something that Photoshop is doing.
They are Canon CR2 RAW files from a 5D MkIV so bigger than the attachment limit - what do I do?
Here are the files then https://www.dropbox.com/sh/451pwsxijvb7ft3/AADRIcLLIo6x8DbnvVVlvPX_a?dl=0