They didn't take down that one file, they basically took down the whole site. It's actually still on the net, but you have to change the DNS entry on your hosts file and that's not something you should mess with if you don't know what you're doing. They'll probably take it completely offline soon enough.
The good news is that all of the original Vault content was backed up and is available on the community-run, IGN-less Neverwinter Vault:
http://neverwintervault.org/You can download the CEP from there.