Hi Bill,
Are you referring to the "New Eddystone Rock"? First, search for that. (instead of "Eddyiton".) In the FSX scenery library, press add and search under "N" for New Eddystone Rock. Click to highlight it and press "OK". When the next window with the scenery folder in it pops up, right or left click anywhere in the box's white space. But you probably know how to add scenery to FSX already.
If you don't have it on your computer anymore, just download it from here again and reinstall it.