diff --git a/help/help.htm b/help/help.htm
index b01099f..928cdbe 100644
--- a/help/help.htm
+++ b/help/help.htm
@@ -76,7 +76,8 @@ <h2>Settings</h2>
 <h2>Usage</h2>
 <p>This plugin doesn't have any own functionality.
 It serves as framework and toolkit for other plugins.
-Documentation for plugin developers can be found in help/api.chm.</p>
+Documentation for plugin developers can be found in the
+<a href="http://3-magi.net/?CMSimple_XH/Pfw_XH/SDK">SDK</a>.</p>
 <div class="toplink"><a href="#">back to top</a></div>
 </section>