This feature contains nodes for reading and writing Excel files with
KNIME. It uses libraries from the Jakarta POI project (http://jakarta.apache.org/poi/index.html)
which is part of and copyrighted by the Apache Software Foundation
(http://www.apache.org).
Extension 
KNIME Excel Support
Included nodes & related workflows
Legal
Copyright by KNIME AG, Zurich, Switzerland
This plugin uses libraries from the Jakarta POI project
(http://jakarta.apache.org/poi/index.html) which is part of
and copyrighted by the Apache Software Foundation (http://www.apache.org).
Update site information
KNIME Analytics Platform 4.4 Update Site, Version 4.4.0
http://update.knime.com/analytics-platform/4.4
In case you can’t install the extension via drag & drop, please check that the update site is activated.