Best method for me atm in terms of save editing.
1) Back up your last autosave/manual save (in case you goof up).
2) Next time you want to make a save file for editing, exit out of the game while checking the create save function to make an "autosave_exit" save file.
3) Back up this new save you plan on editing as well to be sure.
4) Edit the save using notepad++ or whatever other text editing program of your choice.
5) Keep the notepad++ file up (because of step 6 is why)
5b) If you still break your save, you may have made a typo or used the wrong term for something, or maybe accidentally changed a date/value and removed the period.
6) If it works, have fun. Rinse/repeat as desired to override stupid things like your supposedly "chaste" spouse wanting to get beheaded after you torch their lover.