So i manually backed up my saved about a year ago can I some how make the new patch detect that?
So long as you didn't screw around with your GFWL files, you should be OK with just moving the DS save back to its original location. It might even still be there (PC saves rarely get deleted when a game is uninstalled)!
edit: Location of Dark Souls save file in Windows 8:
<WINDOWS DRIVE>\users\<USERNAME>\Documents\NBGI\DarkSouls