Update index.html

Author: cabooster

index.html

@@ -92,7 +92,7 @@ <h3>Tracking in a completely unsupervised manner:</h3>
   <center>We have released a user-friendly <a href="https://cabooster.github.io/UDMT/Tutorial/" target="_blank">graphical user interface (GUI)</a> of UDMT to make it an easily accessible tool for ethology and neuroethology.</center>
   </p>
   <p>
-  <center><img src="https://github.com/cabooster/UDMT/blob/page/images/GUI-V2.png?raw=true" width="850" align="middle" /></center>
+  <center><img src="https://github.com/cabooster/UDMT/blob/page/images/GUI-V3.png?raw=true" width="850" align="middle" /></center>
    </p>
    <br>