Changing Race and Class names?

[Deafrunner]

Hello I don't think i have seen a post of this here,
I checked Pretty thoroughly.
I saw on a video how to change race class even area names through dbc files in mywarcraftstudio.
I followed the directions but when i extract the file and edit it.
I delete the dbc and replace it with the new one but nothing comes up on the chr races dbc it doesnt post the properties or anything.
then when i start up wow again I get a wow error saying the file is corrupt.
Is this because i need wowme or am i doing something wrong here?

I have successfully changed the face icons but not the race or classes if someone can tell me how i would gladly +Rep.