If you want to update all the plugins and Themes latest version then follow these steps.

• Download Easy Theme and Plugin Upgrades plugin on your WordPress website.
• If you want to remove the license notification, then go to ‘WP Nag Hide’.
• After downloading this plugin you have to activate it.
• You can also search for this plugin inside WordPress. (It’s free to download)
• The download the theme or plugin you want to update from XYZ Theme.
• Open your WordPress Admin Panel / Dashboard.
• Go to “Plugins > Add New” in case of plugin OR “Appearance > Themes > Add New” in case of theme.
• Click the “Upload Plugin” or “Upload Theme” button, as the case may be.
• Select the zip file with the new plugin or theme version to install.
• You have to Install that plugin.
• After installation, press “Activate” plugin or theme.
• Now you check your plugin or theme version.