I don't know if you are still having trouble Nayroy but I was having the same problem and figured it out. Not sure what you use to extract your save but I use Horizon. Instead of extracting the entire save file open the file, go to the contents tab, and extract the SaveGame.sav and that is what you open in the editor. Hope that solves it.

If this doesn't make sense to you here is a link to a tutorial video. Just do exactly what he does.
https://www.youtube.com/watch?v=7lq1Xy1X10c