RE: AVG Free 2013 and Link Scanner 2013 mix up
The LinkScanner as a component is not listed in the AVG user interface. You can find there the Web Browsing component which does the same job (if you click the component, you can configure the LinkScanner).
In order to remove to remove the currently installed AVG software and to install AVG 2013 Free Edition, please follow this AVG Forums article.
Please let us know, if you need more information.