Undoing define( ‘UPLOADS’, ”.’files’ ); to repoint to “wp-content/uploads” folder

If u want to just change the upload directory you can use something like this:

function wp128084_upload_dir( $pathdata ) {
     // change path here
     return $pathdata;
}

add_filter('upload_dir', 'wp128084_upload_dir');

and again to remove this you can use this

remove_filter('upload_dir', 'wp128084_upload_dir');