added instructions for Xbox Retail Mode (#5764)

docs/installing.md

@@ -144,11 +144,13 @@ If you'd like to use this option, scan the QR code below.
 
 <details><summary>Xbox One/Series</summary>
 
-- Open https://gamr13.github.io/ in the Microsoft Edge browser on the console and install the Gamr13 Appstore
-- Install DevilutionX and FTP-server from the Gamr13 Appstore
+- Go to https://gamr13.github.io/ and follow the instructions in the Discord server
+- Install DevilutionX and FTP-server from the given URLs
 - Open DevilutionX
 - Open and start the FTP-server
-- Copy the MPQ files to `/LOCALFOLDER/*Gamr13*DevilutionX*/LocalState/diasurgical/devilution` using a FTP-client on your PC
+- Press `View` on DevilutionX and select `Manage game and add-ons`
+- Go to `File info` and note `FullName`
+- Copy the MPQ files to `/LOCALFOLDER/*FullName*/LocalState/diasurgical/devilution` using a FTP-client on your PC
   
 ![image](https://user-images.githubusercontent.com/204594/187104388-fc5648da-5629-4335-ae8b-403600721e2a.png)
 

docs/manual/platforms/xbox-one.md

@@ -1,6 +1,7 @@
 # DevilutionX (Diablo 1) for Microsoft Xbox One/Series
 
 ## Installation
+### Dev Mode
 1. Download and unzip [devilutionx-xbox-one-series.zip
 ](https://github.com/diasurgical/devilutionX/releases/latest/download/devilutionx-xbox-one-series.zip
 ).
@@ -11,9 +12,11 @@
 6. Copy `diabdat.mpq` from your CD (or GoG install folder) to it.
 7. In the Xbox press `View` on DevilutionX and select `Details` and there change the type from `App` to `Game`.
 
-## Usage
-
-Launch `DevilutionX` from the Dev Mode home.
+### Retail Mode
+1. Press `View` on DevilutionX and select `Manage game and add-ons`
+2. Go to `File info` and note `FullName`
+3. Connect to the Xbox via FTP and go to the folder `/LOCALFOLDER/*FullName*/LocalState/diasurgical/devilution`
+4. Send `diabdat.mpq`
 
 ## Controls