you have to make the edits in RefSkill too ( in database - sql )
in case there are some errors, GS won't start...
Extracting a file from your client is not affecting the client at all!
Perhaps the editing way was wrongly executed, try to use a proper decrypter , then to encrypt the file again and import it , in the right path , in your client.
If you ain't able to do so , just make the edits in the database, RefSkill , then download and open this program

after all import everything into your Media.pk2