Who sees ads crashed

Hi:
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Config: LAMP / WPMS 3.0.1
Theme: edu clean
Plugins: TOS, Wordpress Importer, Login Image
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I just installed Who Sees Ads and named a new context: 1
After that I dragged into Active Rules: If visitor is logged in then display.
Then Saved Context.

After that the system crashed.

This is the error message in top of the page:

Warning: Invalid argument supplied for foreach() in /home/comunida/public_html/wp-content/mu-plugins/wp_ozh_whoseesads.php on line 471

Warning: Cannot modify header information - headers already sent by (output started at /home/comunida/public_html/wp-content/mu-plugins/wp_ozh_whoseesads.php:471) in /home/comunida/public_html/wp-content/mu-plugins/wp_ozh_whoseesads.php on line 638

Warning: Cannot modify header information - headers already sent by (output started at /home/comunida/public_html/wp-content/mu-plugins/wp_ozh_whoseesads.php:471) in /home/comunida/public_html/wp-content/mu-plugins/wp_ozh_whoseesads.php on line 639

In the admin panel this is the error:

Warning: Invalid argument supplied for foreach() in /home/comunida/public_html/wp-content/mu-plugins/wp_ozh_whoseesads.php on line 471

I just deleted the plugin.
But want also to delete the data created by the plugin. How can I perform a FULL delete of the data and tables and everthing this plugin created?

I just want to get rid of the plugin and all damage it could have created to my db.

Thanks,

Charles