I was just playing with Viveza and it looks like it does not colour manage correctly.  My setup: WhackedRGB as my display profile, so I can easily spot if it's wrong. Opened DXO PhotoLab2, which comes with Nik collection Opened a jpeg and it had the correct channels swapped, which means Photolab color manages correctly Set the file to Viveza, and the image did not have the channels swapped, meaning that Viveza UI does not colour manage.  As far as I can tell,