realmlist.wtf problem

I've got problem with realmlist.wtf! I wanted to change its contents by using notebook then after i saved it, it permanently changed to notebook and i can't fix it :( Please help me

this is screenshot

http://imgur.com/NGPqa0c

There is nothing wrong with it. You just set Notepad as default program for opening .wtf files. The file will work as it should if its contents are correct.

so how can i fix it? can u tell me?

Fix what? There is nothing broken. Everything is the way it should be. WoW can still read the file as it should.

but when i try to log on my account on WOW update appears which shouldn't be

Log in with username not email.