[Solved] Cannot change NAS IP Address

I have a problem since I changed my ADSL modem/router.
I had to change the IP address of my NAS.
I tried to change its address accordingly in Volumio. Each time, the change is not saved, and the IP address remains the same.
Do you have any clue about this problem?
Shall I reinstall Volumio?

I finally reinstalled Volumio!