I managed to get the game so I'll be tinkering with it and I'll let you guys know
Update:
Save file for PC release is located in "Documents/Neo The World Ends with You"
The editor is not compatible with this save file at the moment.
I'm working on it.
Interestingly enough, the game's save file is called "f1fc4b9d54965358d41213ae8ff0a0f7"... which is the MD5 checksum for the word "gamesave".
Update 2:
PC save file is "encrypted" (in quotation because I don't really know if it's really encryption)
There is also 1060 more bytes than in the PS4/Switch save file.
We need to figure this out in order to have support for PC files ^^ I'd appreciate any help because this looks like it's gonna take a while.
I've documented what I could find in here: