You changed something in the file format ???
I bought ACDSEE studio because it was able to display a preview of .afphoto and thus could serve as DAM (function that is sorely lacking and ... requires to buy other product ...)
Except that since the last version of affinity photo, the .afphoto are no longer recognized by ACDSEE !! :-(
Older .afphoto, continue to be recognized by ACDSEE.
Please don't say me that i bought ACDSEE for nothing!