Change README

README.md

@@ -1,2 +1,35 @@
 # mca-coh-gui
-GUI-based COH dongle backup tool for Namco System246 / 256.
+
+![Downloads](https://img.shields.io/github/downloads/XyLe-GBP/mca-coh-gui/total.svg)
+[![GitHub (pre-)release](https://img.shields.io/github/release/XyLe-GBP/mca-coh-gui/all.svg)](https://github.com/XyLe-GBP/mca-coh-gui/releases)
+
+GUI-based COH dongle backup tool for Namco System246 / 256.  
+
+# Caution
+
+With a view to preventing the distribution of illegal copy dongles, this application will not work by itself.  
+For it to work, 'mca-coh.exe' must exist in the 'res' folder in the same location as the application.  
+mca-coh.exe must be obtained from somewhere on your own.
+
+This application was created solely to facilitate backup of the dongle and cannot be used for any other purpose such as selling illegal copies.  
+If it is discovered that this application is being used for such purposes, this repository will be immediately frozen and completely deleted.  
+
+## What can you do?
+
+It can rewrite or dump files in the dongle.  
+This allows you to back up your Sys2x6 game dongle.  
+
+It is possible to replace one dongle with another game dongle by rewriting the dongle-specific keys.  
+
+This application can only be read by the Sys2x6 COH dongle (COH-H10020).  
+PS2 memory card (SCPH-10020) cannot be read.  
+
+Languages supported are English and Japanese.  
+
+## Developed
+
+VS2022, C#
+
+## Licence
+
+MIT