The provided file is a v2 design. This version has a separate schematic file with a .epc file extension. The v2 schematic file cannot be opened in any later version of PCB123, nor can it be converted to work with v5. You can continue to open this design in v2 and update it. When you place your order you will need to use v5. Make sure to keep a back up of your v2 designs. Once you save the 123 file in v5 you will no longer be able to open it in v2.
Software Support Engineer I Sunstone Circuits
13626 S. Freeman Road
Mulino, OR 97042
Phone: 503-829-9108 x226