The suitable viewer and CAD tool for the "DC2530A.zip"

Hi,
I downloaded DC2530A.zip from DC2530A Web site.
But I could not open DC2530A-3.PCB by CR5000, ORCAD or PADS.
My PC is Windows10 Pro 64bit.
Could you recommend the suitable viewer and CAD tool?
Or could you send the update PCB file for CR5000, ORCAD or PADS?

Regards,
Tatsu

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