Upload & Sell: Off
Note in the instructions:
"...The shutter counter will not be displayed (or will be displayed as "0") on the 1D*, 5D, 10D, 20D, 30D, 300D, 350D, and 400D. It's not that I have anything against the owners of those cameras, but simply that the Canon SDK does not support retrieving the shutter count for them. "
Don't know of any program to determine shutter count on the 1D or 5D series.
I think it'll work for the 5d2, but not 5dc.