Hello,
you should open your Generator page in the browser:
http://www.yourdomain.com/generator/ and you will see the "Crawling" tab on that page.
An example is on the demo page:
http://www.xml-sitemaps.com/generator-demo/The cron job command line looks like:
/usr/local/bin/php /path/to/your/generator/runcrawl.php
The cron task is usually setup in Hosting Control Panel and exact steps depend on which Control Panel software is installed on your server. You should contact your hosting provider to find out.