Update version

Author: Gumball2415

hlp/main_index.htm

@@ -34,7 +34,7 @@
     </table>
 
     <hr />
-    <span class="copyright"><em>Version Dn0.5.1.0</em></span></br>
+    <span class="copyright"><em>Version Dn0.5.1.1</em></span></br>
 
     <p class="heading">Overview</p>