Philosopher's Stone 1.0.1

• The game's Xbox disk images now live beside it, in saves\xbox, instead of a folder shared by every port
  (%LOCALAPPDATA%\xboxrecomp). Each port keeps its own, the folder stays portable, and a game started from a
  packaged (MSIX) app no longer quits at boot because it can't open them. Your saves were already beside the game
  and stay where they are.

With thanks, as ever, to MiddleDucky.

Installing

The easiest way is the Barthes Launcher: it installs the build for your disc, unpacks and checks the disc, and keeps the port up to date.
By hand: download the zip for your disc (PAL for Philosopher's Stone, USA for Sorcerer's Stone), put your disc's files or the .iso in a game folder beside the executables and start hpps_launcher.exe. Updating: replace the files from the zip and keep your hpps.toml, saves\ and shadercache\.

You need your own copy of the game. Nothing from the game is included.