In your magento admin panel, go to System. Then select Magento Connect and Magento Connect Manager. Then in the Upload package file: upload plugin Chater_LiveChat-1.0.9 and click Upload. When you see the message on console Cache cleaned successfully clock on the Refresh button.
Download Magento Plugin
Now in the admin panel select the Chater.biz tab and go to the plugin configuration. In the Chat HTML code paste our chat script and save changes by the Save Config.