The Primary IP of a Softaculous license must be correct otherwise it will not show your license as premium although it might be a Premium License. Nearly all servers have multiple IPs and one of them is your primary IP or the IP which is used by your system to make requests. You can determine your correct IP before purchasing a license so that installation of Softaculous goes smoothly.
Simple Shell Commands
To determine your Primary IP SSH to your server and execute the following line of code :
wget http://softaculous.com/ip.php; cat ip.php; echo "";
The IP that will appear after executing the above command will be the correct License IP as well.