How to update the firmware of DSTREAM? Which tool to use exactly? I am not getting sufficient information on web.

I am trying to debug my code using DSTREAM. DS-5 version is 5.24.1. I am getting error related to DSTREAM firmware and asking me to update it's firmware.

For that, I am not getting sufficient information on web.

for example, on below link,

ARM Information Center

It is written that "You can update the DSTREAM firmware using the installed Update utility." but what is this installed update utility, What is the name? Where i can find it?

Thanks