Update README.md for 6.6 release

Author: akenmorris

README.md

@@ -22,7 +22,9 @@ Latest Release
 <!--![](docs/img/about/release6.1.png)-->
 <!--![](docs/img/about/release6.2.png)-->
 <!--![](docs/img/about/release6.3.png)-->
-![](docs/img/about/release6.4.png)
+<!--![](docs/img/about/release6.4.png)-->
+<!--![](docs/img/about/release6.5.png)-->
+![](docs/img/about/release6.6.png)
 
 Quick Links
 =====================