Hi again Paul,
Unfortunately, after playing and messing with it, I can't manage to do it.
My usb_desc.h is as follows:
#elif defined(USB_MIDI)
#define VENDOR_ID 0x16C0
#define PRODUCT_ID 0x0485
#define MANUFACTURER_NAME {'T','e','e','n','s','y','d','u','i','n','o'}
#define...