Error when deleting prefix.

Hello,

I am not yet able to use this addon as there seems to be an error. I can no longer delete any prefix's regardless of if they are for the resource manager or not.

Server Error

Mysqli prepare error: Table 'thereefu_xenfor.xf_resource_prefix' doesn't exist

1. Zend_Db_Statement_Mysqli->_prepare() in Zend/Db/Statement.php at line 115
2. Zend_Db_Statement->__construct() in Zend/Db/Adapter/Mysqli.php at line 381
3. Zend_Db_Adapter_Mysqli->prepare() in Zend/Db/Adapter/Abstract.php at line 478
4. Zend_Db_Adapter_Abstract->query() in Zend/Db/Adapter/Abstract.php at line 661
5. Zend_Db_Adapter_Abstract->delete() in Brivium/XenResourcePrefix/DataWriter/ThreadPrefix.php at line 55
6. Brivium_XenResourcePrefix_DataWriter_ThreadPrefix->_postDelete() in XenForo/DataWriter.php at line 1738
7. XenForo_DataWriter->delete() in XenForo/Controller.php at line 918
8. XenForo_Controller->_deleteData() in XenForo/ControllerAdmin/ThreadPrefix.php at line 179
9. XenForo_ControllerAdmin_ThreadPrefix->actionDelete() in XenForo/FrontController.php at line 310
10. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 132
11. XenForo_FrontController->run() in /home/thereefu/public_html/admin.php at line 13

Need some help please.

Thanks.