Hey Simon and J,
I’ve been testing the modified template file for portfolio pages which should display ordinary posts instead or projects, and it is not behaving well enough. It still needs some work on it, since it hasn’t been envisaged in the theme originally; in the meanwhile, I can recommend using the Post Type Converter plugin which was created specifically for such situations – to convert the posts into projects. Thank you for your patience!
Sincerely,
Andrii / Satori Studio