On the bottom of your Grand Piano Pro, you will find a silver sticker displaying the serial number of the Soundexpander.
If the serial number is below 3,000, you need to perform an Flash update to ensure that the sound list in the app matches the sounds of the Soundexpander correctly.
The 25 November 2025 update introduces new sounds as well as additional improvements.
Please perform the flash update as described in the link below.
https://v3sound.com/en-update-flash-memory.html