Update README.md

Author: KakersUK

README.md

@@ -1,13 +1,27 @@
 # SCSS Compiler
 
-A Sublime Text 3 plugin which compiles the selected SCSS to CSS in your document.
+A Sublime Text 3 plugin which compiles the selected SCSS to CSS in your document window.
+This plugin depends on ruby being installed and the `scss` compiler binary being installed via ruby gems.
 
-# Installation
-This plugin depends on the 'python-scss' application, which can be installed using PIP.
+### Usage
+Select the SCSS which you wish to compile, right click and select "Compile selected SCSS to CSS". You may need to wait a few seconds for the compilier to do it's thing, and then your SCSS should then be transformed into CSS!
+
+---
+# Installation on Linux & OS X 
+
+Open a Terminal window and run the following command:
 ```
-pip install scss
+sudo gem install scss
 ```
-This script also assumes that the `scss` binary is in the following location: `/usr/local/bin`.
+This script assumes that the `scss` binary is installed in the following location: `/usr/local/bin`.
+
+# Installation on Windows
 
-# Usage
-Select the SCSS which you wish to compile, right click and select "Compile selected SCSS to CSS". You may need to wait a few seconds for Python to do it's thing, and then your SCSS should then be transformed into CSS!
+Download and install the [Ruby installer](https://rubyinstaller.org/).
+
+**Ensure the "Add Ruby executables to your PATH" is enabled during the installation process.**
+
+Open an Admin Command or PowerShell window and run the following command:
+```
+gem install scss
+```