Uprading the module is very simple. All you need to do is to download the latest version from our client area, and upload the files to the module’s folder.
First, you will need to login to your client area and download a copy of “WHMCS Invoice4U“.
From the client’s area top menu click “Services” -> “My Services“.
Open the “View Details” box by click the arrow on the right, and click “Downloads“, in the following screen click the “Download” link.
Once downloaded, unzip the file and upload the folder “invoice4u” (as is) to your WHMCS installtion.
The folder should be uploaded to the following path: “modules/addons”.
After uploaded, the full path should be: “modules/addons/invoice4u“.
You are all set.
*It is recommended to save a copy of the old version in case you will need to roll back your changes.