This is correct.
mvmiranda started the thread and created the tool. I did not work on mvmiranda's Save editor and I do not have any access to the source. However
mvmiranda seems to have dropped this project and it is "outdated" and buggy (Not trying to talk down his work - it's awesome). There are a lot more things you can do with save editing that the Save Editor doesn't include. So I would like to create a new Fantasy Life Save Editor including the current features (including fixing the rank stuff). And adding Item Editing, Skill Editing, possibly Quest Editing, "Character Design" editing etc.
I'd however like to find the DLC Unlocking/Locking Part first and may eventually include that.