our client is using Excel-Like Product Manager for WooCommerce and WP E-commerce Version 2.1.28. Since latest WordPress update 5.6 this version doesn't work anymore. The plugin shows there is a new version 2.1.76 for update available. Since the client has already manually configured the existing Plugin Version, the update needs to be run without loosing any configuration or other data.
However, since the update process seems to not work over WordPress Plugin Manager, it needs to be done manually. Could you please give me an instruction how to update to the latest version?