Witcher 3 Remastered crashing with Reshade on loading a save

Hello all, I've got this problem with Reshade and The Witcher 3 Remastered. 

If I have Reshade installed the game crashes while loading a save.  Reshade seems to be fine and accessible in the Main Menu, but as soon as I load a save, the game crashes and sends a crash report, just at the point where the little loading circle on the bottom right of the screen changes from being over a dim Velen background screen to being completely blank, and without the line under the loading circle - i.e. the loading circle just freezes when it gets to the point where it's on its own on a blank screen, when normally after a co0uple more seconds the game world would fade in.

I've Googled this ofc but most of the returns seem to be about older problems that don't seem to be relevant (I've attempted some of the googled fixes and none of them work - e.g. changing the name of the .dll and that sort of thing). 

(One fix that does work and enable Reshade to work in game is to turn off the RT/PT.  Then it's all fine.  But ofc I want to have RT/PT on!  )

Any pointers gratefully accepted.  TIA