Glad you found the audio only setting.
In theory, ALL settings should be preserved by a database backup: File > Library > backup library . Then when you reinstall, move computers, upgrade, etc, you restore the backup with File > Library > restore library. In this restore process you can choose to restore the library entries (references to your music, movies, etc), or your settings, or both. Restoring your settings should get just about everything. It definitely should get the audio only setting.
Brian.