I played FFXIV 1.0 and registered my copy way back in the day.
I still have the copy and registration code. When I downloaded the FFXI client from here http://na.finalfantasyxiv.com/lodestone/topics/detail/607fcd5b2c7eca6ff3e9e9b097d1f1fdcc37b4db
I got it on my PC. After getting it on my PC and launching it I selected "I already have an account" typed in my account info and it asked for my Registration code. After typing in the code it says "That registration code is already in use" .... well Duh! It's in use in the same account that I am logged into!
Am I doing something wrong? I am trying to get the PC client.