There are three different ways to install KNIME extensions. Option 1: In the Menu Bar click on "File" -> "Install KNIME Extensions..." and select the required extension Option 2: Open a Internet Browser go to hub.knime.com, search for the required extension and drag and drop it into the workbench Option 3: Open a workflow containing nodes from an extension. KNIME will automatically find the required extension and ask you to install it.