Nostalrius Begins - Quality wow vanilla realm (1.12)

I accidentally selected set Test Realms - IsVV2 at the realm selection login. I got instantly disconnected after i hit Enter.
I'm unable to login/play. The problem is that each time i restart/try to enter the game, Test Realms - IsVV2 is set as my default realm, so after i type my account info and hit enter, i'm getting disconnected.

How do i change my current default realm (Test Realms - IsVV2) at the login back to Nostalrius Begins?

Solved here: http://forum.nostalrius.org/viewtopic.php?f=45&t=2282

"You'll have to change default realm back to Nostalrius Begins. I've accidentally done the same thing. Solved my issue by making a file named "config.wtf" (without quotes) in the main WoW folder installation (where WoW.exe is located).

Type this inside the config.wtf file and save it:
SET realmName "Nostalrius Begins"

The downside of this is that it will reset your video/sound settings (unless you know the video/sound commands/values and type them out in config.wtf) and you'll have to set them all over again."

confirmed this gets u to the realm selection screen

however once there, it will disconnect as normal and then continue to do so as before