Click here to check your version and Here to Download and here is an Alternate Download make sure you uncheck any unwanted add-ons and download both the one for IE and the other for other Browsers such as Firefox & Opera plugins! Note: Not needed for IE on Windows 8 or 8.1 but the plugin version still needed if using other Browsers above.
Adobe Air Download: http://get.adobe.com/air/?promoid=JZEFV
Daniel 🙂