or.... chose all files isntead of bryce 3..and you'll see the bryce file on the list.. click on that..and it will open up. 

jack.. rule of thumb for any software..later versions can open older version files..but early versions cannot open newer versions. thus.. bryce 3 cannot open a bryce 7 file, but bryce 7 can open a bryce 3 file. that's how it goes with every software..including ms office. otherwise..everyone would inudate the software company with curses if older files cannot open up!

cheers and happy brycing..