I wil answer my own question:
EDIT!!! I purchased DXO Photolab 2 and it works beautifully on GFX50R files (my 23mm lens and 32-64mm lens, but not yet my 100-200 lens ). The interface is the same as I am used to from my experience of many years with DXO Optics Pro. I plan to use DXO Photolab to develop my raw RAF files, but will still probably make final tweaks in Photoshop before printing. I have the free version of Capture 1 Express for Fuji, but I just cannot use it. I lose files in it not knowing where the program stuck them, and also have problems opening raw files because I cannot find them! (Senior Citizen thing!!)
Thanks all
Dave in NJ