if you want to keep your old spitfire main menu music back up the files go to DCS World/Mods/aircraft/SpitfireLFMkIX/Skins/1/EditorMusic and back up the files.
INSTALL: Go to DCS World/Mods/aircraft/SpitfireLFMkIX/Skins/1/EditorMusic and replace it.
It will ask if you want to overwrite. Do so.
