[Plugin: WP Web Scraper] Export in Html file?

Hi I’m using this code to grab all the posts content in the “main” tag:
<?php echo wpws_get_content('http://example.com','#main')?>

It works exactly grabbing all posts. I’m using it in a custom page template but I would like to save it an html file.

As the Plugin Author said to me:
The plugin can extract all the desired HTML and save it some place - MySQL or a text file.

How can I save the html extracted in a text file?

Thanks