I created a *.afphoto document and a *.psd export for a customer on my Mac (OS Mojave, Affinity Photo 1.7.3). He could open neither of the two documents with the error message "The file version is not supported by this version of Affinity." My client was using the Windows trial version of Affinity Photo 1.7.3. However, he could open the *.psd document in the latest Affinity Designer trial (also Windows).
I can provide the files but I cannot upload them into this open forum due to copyright issues.
