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Where did you buy it? I'd be very very odd that Canon wouldn't include new software.
Also, pictures and details at Adorama show software included.
Anyone who got a 6D cares to confirm if you got a CD or not?
Anyway, do you have a previous version of the DPP software? If so, did you try to download and update from the Canon website? They should have the latest version there, but you'll need any previous version installed or you know how to modify the registry.