Lightning Tools Actions documentation: https://help.lightningtools.com/lightning-tools-actions

Installation instructions for SharePoint Online: https://help.lightningtools.com/lightning-tools-actions-installation-configuration/installing-lightning-tools-actions
Follow the same process to upgrade.

Installation instructions for SharePoint 2019/SE: https://help.lightningtools.com/lightning-tools-actions-installation-configuration/installing-lightning-tools-actions-in-sharepoint-2019se
Follow the same process to upgrade, including running the LTDeploy application.
