help helps return my htc one m8 original sense

very good hello, the next is for help, pardon my Ingres but use the translator, my native language is Spanish, I have a htc one free m8, a couple of weeks ago I gave a friend to change the room, he had unlocked bootloader and S-OFF was now returned to me with a GPE Romm, liquidsmoot 4.4.4 and S-ON, the rom is not to my liking, and I return it to HTC Sense, take it to my friend again and not know how to return it to sense, I need help please I can do?