This article outlines the recommended process to upgrade an i-lign version within the same series. (eg, i-lign 7.2 to i-lign 7.4).
i-lign version download zip from ilign.com (contact firstname.lastname@example.org for the download link when required).
Stop i-lign service
Copy existing ROOT.war file to another file location for rollback purposes
Delete ROOT.war file and ROOT folder
Unzip ilign-7.x.x.zip to Webapps folder
Start i-lign service