Fatal error when activated..

I tried using this app again, but it could not be activated as it comes up with a fatal error with the following message;

Parse error: syntax error, unexpected ‘[‘ in /hermes/bosnaweb25a/b2737/ipg.u3ainkennetcouk1/u3ainkennet.org.uk/wp-content/plugins/jtrt-responsive-tables/admin/partials/jtrt-responsive-tables-shortcode-gen.php on line 13

By the way, I am using the Twenty Ten theme.