Add this to functions.php in your WordPress Theme for

ShoppParentCatsWidget.php

if ( class_exists('WP_Widget') && ! class_exists('ShoppParentCategoriesWidget') ) {
	class ShoppParentCategoriesWidget extends WP_Widget {
	
	    function __construct () {
	        parent::__construct(false,
				$name = __('Shopp Parent Categories','Shopp'),
				array('description' => __('A list or dropdown of the store\'s parent categories','Shopp'))
			);
	    }
	
	    function widget($args, $options) {
			extract($args);
	
			$title = $before_title.$options['title'].$after_title;
			unset($options['title']);
			$options['depth']=1;
			$menu = shopp('catalog','get-category-list',$options);
			echo $before_widget.$title.$menu.$after_widget;
	    }
	
	    function update($new_instance, $old_instance) {
	        return $new_instance;
	    }
	
	    function form($options) {
			?>
			<p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title','Shopp'); ?></label>
			<input type="text" name="<?php echo $this->get_field_name('title'); ?>" id="<?php echo $this->get_field_id('title'); ?>" class="widefat" value="<?php echo $options['title']; ?>"></p>
	
			<p>
			<input type="hidden" name="<?php echo $this->get_field_name('dropdown'); ?>" value="off" /><input type="checkbox" id="<?php echo $this->get_field_id('dropdown'); ?>" name="<?php echo $this->get_field_name('dropdown'); ?>" value="on"<?php echo $options['dropdown'] == "on"?' checked="checked"':''; ?> /><label for="<?php echo $this->get_field_id('dropdown'); ?>"> <?php _e('Show as dropdown','Shopp'); ?></label><br />
			<input type="hidden" name="<?php echo $this->get_field_name('products'); ?>" value="off" /><input type="checkbox" id="<?php echo $this->get_field_id('products'); ?>" name="<?php echo $this->get_field_name('products'); ?>" value="on"<?php echo $options['products'] == "on"?' checked="checked"':''; ?> /><label for="<?php echo $this->get_field_id('products'); ?>"> <?php _e('Show product counts','Shopp'); ?></label><br />
			</p>
			<p><label for="<?php echo $this->get_field_id('showsmart'); ?>"><?php _e('Smart Categories:','Shopp'); ?>
				<select id="<?php echo $this->get_field_id('showsmart'); ?>" name="<?php echo $this->get_field_name('showsmart'); ?>" class="widefat"><option value="false"><?php _e('Hide','Shopp'); ?></option><option value="before"<?php echo $options['showsmart'] == "before"?' selected="selected"':''; ?>><?php _e('Include before custom categories','Shopp'); ?></option><option value="after"<?php echo $options['showsmart'] == "after"?' selected="selected"':''; ?>><?php _e('Include after custom categories','Shopp'); ?></option></select></label></p>
			<?php
	    }
	} // class ShoppParentCategoriesWidget
}

add_action( 'widgets_init', function(){
     register_widget( 'ShoppParentCategoriesWidget' );
});