ART (a fork of RawTherapee) and Darktable (there's one version that can open . orf files)are very good alternatives for raw development and totally free. Even when .orf files will be supported by Affinity Photo I will keep using these programs for raw development because they are really MUCH better in RAW development then Affinity Photo , which has only rudimentary raw development possibilities. And it is very easy to load the raw developed files into Affinity Photo as .tif files. Another possibility is to convert the .orf files to DNG files with the free downloadable Adobe DNG converter. DNG is not exactly the same as RAW, but they give very good results. DNG files will open in the raw development module of Affinity photo and will be treated as raw file. I see no difference with raw.