Lots of the emulators don't have "versions" also. The libretro cores are constantly updated etc - there is no such thing as a "version" for many of them.

@antnned read up on the docs on this site. You can use the menu to exit emlationststion to the command line. I believe F4 on the keyboard also works. I prefer to us Ssh. I use putty. For editing Es_systems.cfg I typically is an ftp client like WinSCP.