[Plugin: Event Calendar 3 for PHP 5.3] Fatal Error on line 37 in widget.php

Fatal error: Cannot redeclare ec3_widget_title() (previously declared in /home/user/public_html/domain.com/wp-content/plugins/event-calendar-3-for-php-53/widget.php:37) in /home/user/public_html/domain.com/wp-content/plugins/event-calendar-3-for-php-53/widget.php on line 37

I cannot figure out why when I activate the Widget plugin to include the Calendar in my sidebar, I get this error message. Interesting that it is “redeclaring” line 37 on line 37. I am using Event Calendar 3 for PHP 5.3 version 3.1.5 in WordPress 3.4.1.

Is anybody else experiencing this problem?

https://www.ads-software.com/extend/plugins/event-calendar-3-for-php-53/