Work on new download page. Change 18-12 to 4.0.0

index.html

@@ -229,7 +229,8 @@ least one, it may help you to get a first idea of what GF is.
     <dl class="row">
       <dt class="col-sm-3 text-center">2018-11-28</dt>
       <dd class="col-sm-9">
-        <strong>GF 18.12 released.</strong>
+        <strong>GF 4.0.0 released.</strong>
+        <a href="download/release-4.0.0.html">Release notes</a>
       </dd>
       <dt class="col-sm-3 text-center">2018-07-25</dt>
       <dd class="col-sm-9">