I wrote a quick c# program that will load a save and automatically add the new Managing skill. It'll ask you to save it to a new file so it doesn't have to overwrite your current one just in case. This way you don't have to start a new save!
https://drive.google.com/file/d/0B33dd5TmgFZoemhXRVlpLUNzdE0/view?usp=sharing
https://drive.google.com/file/d/0B33dd5TmgFZoemhXRVlpLUNzdE0/view?usp=sharing