[Joomla/Mambo To WordPress Migrator] Migrating a hacked site?

I’ve been hired to rebuild a Joomla site in WordPress. The current Joomla site has been hacked more than once, so I’m a bit nervous about using the plugin to migrate content in case I accidentally migrate malicious code. Would love some advice on whether or not I’m safe to use this plugin.

Thanks in advance

http://wordpress.org/support/plugin/joomla-to-wordpress-migrator