First, you will need to login to your client area and download your free copy of “WHMCS Product limiter” plugins.
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 files (as is) to your WHMCS installtion.
After uploaded, the full path to the module should be: “modules/addons/limit_purchase“.
Login to your WHMCS as admin user, and navigate to “Setup” -> “Addon modules“.
Find the “WHMCS Product limter” module, and activate it –
You will receive a confirmation message –
Now go back to “WHMCS Product limiter”, click “Configure” to add your license key. (leave the local key blank)
Save your changes and your module is all set.
You will be able to access it throught the “Addons” top menu.