Not all foods are unlocked with the unlock button (as of 1.0.2 beta).
http://miitopia.wikia.com/wiki/Food
I could send the common.sav with the Elven Potion if you need help
Thanks for the save editor!
EDIT: Didn't realize you made a new version, sorry
no problem, if something goes wrong with the new version tell me
Again. This is a save editor. A save editor cannot alter the way the game works. It can only change things which are stored in your save file.
Also, never feeding your miis any foods will actually make the game slightly harder, so that you don't feel like you're overpowering everything. Otherwise, your best bet is periodically reducing your mii to level 1 using this save editor.
@Brion What precisely are the "hidden stats" on the editor? Like, why are they hidden? Is it because they're not fully functional for editing, or are they just hidden to make things look better?
They just hidden to make things better, only min and max values are checked, if they are show, users can edit them himself (just click on editor version to hide / show).
Food boost, level by class, Mii relation are like this. I need to found all values for each level, it will be long.