NOTE: Please take backup of your complete website before proceeding with any upgrades for your safety.
Process to upgrade your module to latest V 2.0.0.
Step 1: Replace the complete whmcsintegration directory with the new one.

Step 2: Login to your Nextcloud Dashboard.
You will see a message to upgrade to the new WHMCS integration app.

Step 4: Now click on the Start Update and your app and module will be updated.
In case of any issues, please raise a support ticket at our customer support.