The old version is Openssh v9.5, installed at C:/windows/System32/Openssh. The school forced us to update it to the latest one.
Below are the step:
OpenSSH-Win64-v10.0.0.0.msi from GithubAdministrator. Then double click the msi file.yes button. The program will be installed at C:/Program File/Openssh. (I waited for several minutes for a window which will allow me to choose the installation directory. But there's actually not any.)