Once your WordPress setup starts showing under N99panel, you have two options to update your plugins or themes

• Bulk Update – You can easily update the WordPress core, all the WordPress plugins and themes, in a single action by using the update functionality. Here you have the option to select whether you wish to update the core, or the plugins or the themes.
• Selective Update – When you list WordPress plugins or themes, if the update is available for a particular plugin or a theme, the update link would be visible. Just click it to update that particular plugin or theme.

The good thing is that all this can be done right from within N99panel.