Running Windows 10 64-bit and Affinity Photo ver 1.7.3.481 Until a couple of days ago I could open RAW files (from Pentax K3 camera) and develop without problems, now, both new and previously processed RAW files now appear as very dark and underexposed, The attached files show a dark image that previously was fine when processed, along with Preferences and Assistant settings that I haven't changed in months, and a screen shot of the RAW file as shown in Picasa. As far as I know there have been no changes to my Windows system etc., it just seems that Affinity Photo is no longer opening the RAW files properly. I've no idea why Affinity has suddenly stopped working as it used to.