From your response to Tiger Paw ... It sounds like you don't need the information for that client.
Plus, it's a REALLY bad idea to use a 3rd Party website as a go-between for you and clients. That's just asking to have your design stolen.
I'd recommend you either have it on your own server, that the client can log into their account - or send it to them, they make changes, and send it back to you.