All the instructions for installation, the support forums, a FAQ, etc. can be found on the plugin home page.
This plugin is available under the GPL license, which means that it’s free. If you use it for a commercial web site, if you appreciate my efforts or if you want to encourage me to develop and maintain it, please consider making a donation using Paypal, a secured payment solution. You just need to click the button on the plugin home page and follow the instructions.