I know this is necroposting or whatever, but I saw that it never got answered or this point never got brought up..
Are you trying to edit a Diablo 3 game or a D3ROS game? Because for me that made a difference. I tried editing my Diablo 3 save and it corrupted my saves every try, but once I changed my game to ROS and tried editing it, it worked just fine. I locate it on Horizon, then extract it, then load the extracted files through the Editor and reverse it all when I'm done to put it back on the xbox.
Are you trying to edit a Diablo 3 game or a D3ROS game? Because for me that made a difference. I tried editing my Diablo 3 save and it corrupted my saves every try, but once I changed my game to ROS and tried editing it, it worked just fine. I locate it on Horizon, then extract it, then load the extracted files through the Editor and reverse it all when I'm done to put it back on the xbox.