Does anyone know if reinstalling with also reinstall the purchased "additional" instruments that I bought before I realized that I too was seeing Help in a different language? I cannot locate the purchased instruments in The App Store (they were done from inside GarageBand itself.
The additional content is not installed inside the application.
It is installed in the Library
- /Library/Audio/Apple Loops/
- /Library/Application Support/GarageBand/
Installing and reinstalling the application should not remove the instruments and loops already installed by the in-app purchase.
But you can reinstall the in-app purchase afterwards by using the "GarageBand" menu item "Restore Purchase".
Expanding GarageBand for Mac (v10.0) content with an in-app purchase