Thanx. Just gave it a quick test.
When i load the save it does not read any values from my save. They are all set to 0. I then changed all the values to something unique to test that they all match up.
Note: You must tick 'activate' otherwise the save editor will not make the changes (might be better to just make it 'activated' all the time.
If you press the 'Achievment' or 'Max' button it does not seem to do anything. Would be good if it visually changed the stats on the screen.
There is one stat missing called 'Replays Played'. Probably not important but thought i would note it was missing from the editor.
Also there is an achievment for using a character in battle 300 times which might be in a seperate section.
Did not try the online or other tabs but it looks like it is doing what it should be doing. Well done.