This is a Final Fantasy Windows Edition Cheat Save Editor - Microsoft Store - PC / XB1 Edition - (Non Steam)
You can edit both Demo and Full Game Saves using this Trainer
You will find the instructions with the Downloaded ReadMeFirst.txt , I may need help with working the txt file out better ?, So thank if you can do so.
Credit goes to Mike for the basics of helping make this Trainer, And myself for the Pointers and hex/Dec of the Cheats.
When editing the Save Files your Edits are
Gil/AP/EXP/level to 999
(Note) When Loading are Saving the Save file it may take a little time, but its normal.
Non Seam saves are Located at And (Note) They are Not Encrypted Saves for Non Steam

Non Steam Saves Find and locale @
C:\Users\"YourPCNameHere"\AppData\Local\Packages\39EA002F.FINALFANTASYXVforPC_n746a19ndrrjg\SystemAppData\wgs\000901F374CC32EF_B53301008E414577B8ED4A547DBA0981
Demo: C:\Users\{username}\AppData\Local\Packages\39EA002F.FINALFANTASYXVWINDOWSEDITIONPlayableDemo_n746a19ndrrjg\wgs\"Folder?"\"Folders" -> Saves

The Finals

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Have Fun

1527365747
Original Source Code Attached, Can be opened with MSVC2017
Pointers can be found in the Form1.cs file.
Have fun adding new stuff if you can find within the Game Save files, And Yes MicroSoft Store Saves are 110% De-Crypted as is.