Hello,
I exported a picture (any picture) in CMYK mode with Adobe illustrator, and the color is not correctly showed in v13's image viewer. (Didn't have this problem in v12)
zipped and attached the pic. Scenery.zip (1.8 MB)
Fixed in the next update. Thanks for letting us know!
You can also fix the image, because the error is in Adobe not in Opus.
See my post in Convert Images - Color Discrepency for more info.
Regards
Guido
JPEG developer
CMYK_Scenery_corrected.zip (1.8 MB)