I have a lot of files that include (radio edit) for example.
I want to delete that.
Judas (radio edit) - Lady GaGa
I want to change this to:
Judas - Lady GaGa
Is there an easy way to change this, or do I have to change everything by hand?
Yes you have to use your hand resp. your hands to get it right at your fingertips.
Just thinking about it or wanting, that does not work nowadays.
Fill the edit fields of an action "Replace" with the fitting values.
What you have to do to reach your goal ... see Mp3tag manual and Forum FAQ area.