The rtMedia plugin is updated regularly. We strongly advise you to make sure that your site is running the latest software, and that includes rtMedia.
If you have rtMedia Plugin updated on website, look up the plugin list on your WordPress Dashboard.
On the Plugins page on the Dashboard, select the Update Available tab at the top.
If rtMedia plugin was updated at the WordPress plugin directory, you should be able to update from the dashboard itself.
Alternatively, whenever a new update to rtMedia is available, you will receive a relevant message on the dashboard to update the plugin.