fixed a series of "next" and "previous" topic links that pointed to the wrong pages.
diff --git a/user_guide/libraries/file_uploading.html b/user_guide/libraries/file_uploading.html
index c1c64a5..f01c6f7 100644
--- a/user_guide/libraries/file_uploading.html
+++ b/user_guide/libraries/file_uploading.html
@@ -419,7 +419,7 @@
<div id="footer">
<p>
-Previous Topic: <a href="download_helper.html">Download Helper</a>
+Previous Topic: <a href="encryption.html">Encryption Helper</a>
·
<a href="#top">Top of Page</a> ·
<a href="../index.html">User Guide Home</a> ·