Hello all. Affinity Photo was working fine (except for the occasional crash when Windows was left in sleep mode with APhoto open) until I tried to open a certain large RGB TIFF file. I have now tested other files and they seem to be OK. The two files I cannot open were uprezzed in Photozoom Pro 5 to a size above 200MB. Up until then, I had only uprezzed to about 197MB, and everything worked fine. Those two files are thus above your upload limit size on this forum, so I can't include them. If someone at Serif tech support wants to see them, please contact me. I have since found a workaround - namely uprezzing in Photozoom to 197MB, opening in APhoto and uprezzing the rest of the way. But I thought the developers might be interested in this exception.