[Black Tiger]

Please help me I'm having a problem uninstalling. I got this mod on one forum and tried it on a second, but then wanted to uninstall it again.
Now this is happening:

Fatal error: Existing data passed is not an array
Called set_existing in [path]/admincp/plugin.php(1522) : eval()'d code on line 20
Called eval in [path]/admincp/plugin.php on line 1522
in [path]/includes/class_dm.php on line 235
#0 vb_error_handler(256, Existing data passed is not an array

And a lot more error codes.

I had a look at the solution given in post #34 but this is not good because the uninstall code for 1.1.2 is only:

$db->hide_errors();

$db->query_write("ALTER TABLE " . TABLE_PREFIX . "usergroup DROP solvedthread_permissions");
$db->query_write("ALTER TABLE " . TABLE_PREFIX . "thread DROP is_solved");

require_once(DIR . '/includes/class_bitfield_builder.php');
vB_Bitfield_Builder::save($db);
build_forum_permissions();

// ################################################## #####################
require_once(DIR . '/includes/adminfunctions_prefix.php');
require_once(DIR . '/includes/functions_prefix.php');

$prefixsetdm =& datamanager_init('PrefixSet', $vbulletin, ERRTYPE_CP);
$prefixset = $db->query_first("
SELECT *
FROM " . TABLE_PREFIX . "prefixset
WHERE prefixsetid = 'solvedthread'
");
$prefixsetdm->set_existing($prefixset);
$prefixsetdm->delete();

build_prefix_datastore();

$db->show_errors();

So the text from the solution in post #34 is not present.

How can I fix things so I can uninstall this mod?