Update README.md

Author: DirectedHunt42

README.md

@@ -16,6 +16,10 @@
   </picture>
 </p>
 
+<div align="center">
+<a href="https://sourceforge.net/projects/echoengine/files/latest/download"><img alt="Download Echo Engine" src="https://a.fsdn.com/con/app/sf-download-button" width=276 height=48 srcset="https://a.fsdn.com/con/app/sf-download-button?button_size=2x 2x"></a>
+</div>
+
 <div align="center">
 
 ![Commits](https://img.shields.io/github/commit-activity/m/DirectedHunt42/EchoEngine?color=blue)