Just made this,
It handles a few of the properties in the save,
If you want too handle more settings and not a hex editor use XboxClasses.Title_Specific.Angry_Birds_Trilogy.sav emagic
Flags some times mess up when using a PropertyGrid, if that happens just set them to 0 and then set the corresponding bool.
Download: Angry Birds Trilogy.rar
Source: CBA uploading, use a refractor.