To install the latest update, you will first need to uninstall the current Live eftpos for WooCommerce plugin from WordPress.
Once the plugin has been uninstalled, it will need to reinstalled for the new updates to take effect.
The above steps will only need to be used once for this update. All future updates can be made inside WordPress.
Note: If you do not install the latest update there will be no impact to your online transaction processing and the current plugin will continue to work. However, you will need to update the plugin for the latest features to be enabled.