[Plugin: Nice Search] Plugin deactivation issue – results show on index.php with no query parameters

Hi

Just wondering if anyone could help.

Upon deactivation of this plugin, search results are shown on index.php with no search query parameters on the URL

My website is http://blurayaustralia.com/

If anyone knows how to fix this issue that would be great.

http://wordpress.org/extend/plugins/nice-search/