After you buy WPML, log into your account and go to the Downloads section. You will see OTGS Installer. Download, install, and activate it on your WordPress site and follow the setup instructions.
First-Time Installation of WPML
OTGS Installer will help you choose the WPML components that your site needs, and register WPML.
We’ve created this auxiliary plugin to help you download and install WPML, without worrying about file-size limitations by your hosting provider. Once you’ve installed WPML on your site, you can safely deactivate and remove OTGS Installer.
Updating and Modifying WPML Installation
You will receive notifications for new versions of WPML, just like any other plugin on your site. To manually check for new versions and to install additional WPML components, go to the Plugins → Add New Plugin and click the Commercial tab.