I don't see the FFEX Save Editor being updated, but in case I somehow learn C# sometime soon, I will post an updated one. For now, you can use the current one in tandem with the previously linked spreadsheet and bookmarks for Hex Editor Workshop.
Hate to quote myself, but the combination of spreadsheets and bookmarks practically tell you exactly what to do and change, and can do more than the Save Editor currently can. I mean, I think it's practically idiot proof.