It seems that you can't use the Dacia Media Nav Toolbox to delete the calling list from your navigation system. This tool is developed to help you update your maps. There is no way to use it for other purposes. Also, there is nothing that you can do about the sound that hears when you play music through Bluetooth. This might be automatically played to notify the driver, or it can be caused by a hardware malfunction. In any case, you should contact an official service for further assistance.