Use one engine on two os (Linux & Windows)

I’m interested about this.
I’ve just built a new with dual boot Windows & Linux.
In this I have a a third HD and if possible I’d like to install there and share UE4 installation between the OS to save some redundant disk space.
How am I supposed to proceed?
In Linux I have to download and install Engine from git, but from Windows? I don’t know if I should use Epic Games Launcher?

Thanks!