There's a typo in the path
%LOCALAPPDATA%l\Discovery\Saved\SaveGames\
should be
%LOCALAPPDATA%\Discovery\Saved\SaveGames\
A tip is that the value displayed in the menu seems to be* the first two decimals of the actual value. So you probably don't have to fiddle with a hex editor unless you need it to be exactly right.
*I set the sens to 29 in the menu and it was 0.292884 in the save file.