Document indexer cannot cope with a changed config
First I index files from '

\\company\\manuals', then change the configuration Documents Path to 'F:\\Operational_procedures' , then searching in frontend results in below error:
Fatal error: Call to a member function redirect() on a non-object in
\Xampp1\htdocs\intranet_tst\components\com_docindexer\controller.php on line 58
I whish to index files in multiple directories;
*

\\company\\manuals
* F:\\Operational_procedures
OS: WIndows