As this is not related to software development with the MIP SDK, which is the focus of this forum, please ask again in the support community, you should get better help from the partners using the support community.
I found the StableFPS in MIPSDK installation directory, so I posted the question on this board. Anyway, I created a new one in the support community. Thank you for helping.
Yes, you are right. StableFPS is a tool in the MIP SDK. One prerequisite is device pack 10.4 or higher must be installed on the system to run StableFPS.