1)After got the license confirmation, SSH to your cPanel server as root and run command

/scripts/makecpphp

2) Download the installer using the command below:

cd /usr/local/cpanel/whostmgr/docroot/cgi/
rm -rf /usr/local/cpanel/whostmgr/docroot/cgi/rvsitebuilderinstaller/
rm -f rvsitebuilderinstaller.tar
wget http://download.rvglobalsoft.com/rvsitebuilderinstaller.tar
tar -xvf rvsitebuilderinstaller.tar
chmod 755 addon_rvsitebuilder.cgi
rm -f rvsitebuilderinstaller.tar

3)Open root WHM, at the bottom left menu under Plugins section, you will find RVSiteBuilder Installer menu.

4)Click RVSiteBuilder Installer to begin the installation process.

5)After complete the installation, you will be sent to RVSiteBuilder Manager automatically. Please configure RV SiteBuilder immediatly.

Done!! Your cPanel should show the RVSiteBuilder as a feature in all cPanel users.