The online update merely pulls the latest xcode database from the server to the machine, while I do not think the domain has changed the site has been redone and I am not sure it even works anymore and it is hardcoded into app if memory serves.
Still grab this file
http://www.4shared.com/file/41510327/b07e7640/xcode.html
Replace the old file with that one and any you will be as up to date as any online update ever was.
Xcode is used in adding cheats, soft reset, instant save and the like to the EZ1,2,3,4 and depending on how you work it 3 in 1.