As long as there is no filemanager in the GUI try WinSCP if you are using Windows as client OS. It is very easy to use, just configure ssh with root access and enable the ssh service.
In WinSCP you can browse thru the filesystem and open your conf. files with your favorite Windows editor (notepad++ for example). If you want to make a change just use control+T to open a terminal and type mount -uw / that the filesystem is writable (after a reboot it is read only again).
I think it is easier for changing something in the loader.conf as to login and use vi.