Guys, we were closer last year. There was a working command in command line:
I’d love to have a working GUI to change EXIF information in a way that PhotoLab would recognise a lens but a set of clear command line instructions to do the same thing would be a great start. Sigi (innocently) sent us off on a new wild goose chase with PhotoSupreme which advertises EXIF profile change functionality but 1. doesn’t change the data thoroughly enough for PhotoLab, 2. the developer shows little interest in making this improvement.