Please email me screenshot of the issue you are facing,
The "edittype" should be in small caps.

sorry,
it is the update column but upload

//Upload
$col_f = array();
$col_f["title"] = "UpLoad";
$col_f["name"] = "UpLoad_Link";
$col_f["width"] = "15";
$col_f["editable"] = true; // this column is editable
$col_f["search"] = false; // this column is not searchable
$col_f["edittype"] = "file"; // render as file
$col_f["upload_dir"] = "uploads"; // upload here
$col_f["show"] = array("list"=>true,"edit"=>true,"add"=>true); // only show in add/edit dialog
$col_f["link"] = 'javascript:window.open("{UpLoad_Link}","newwind","height=850,width=1150, resizable=yes, scrollbars=yes"); void(0);';
$cols[] = $col_f;

You have to use 2 columns. one for upload, and another for display download link.
Please refer demos/editing/file-upload.php for working example.