Follow these steps to uninstall the plugin. 

Windows: 

• Open the Control Panel
• Open "Programs and Features"
• Search for "npRTCCplugin" and right click on it

• Select "Uninstall"
• If prompted for a confirmation, click "Yes"

 That's it! The plugin is now uninstalled from your computer.

Mac OS X: 

• Open a Terminal (Terminal.app)
• Run the command: 

rm -fr ~/Library/Internet\ Plug-Ins/npRTCCplugin.plugin

That's it! The plugin is now uninstalled from your computer.