If you want to update one or two scrips you can do it manually.right click the price chart in MS and open edit data. the downloader will open you have to enter the date,open,high,low.close and volume and save it.
If you want to convert the bhav copy to MS you have to do some changes in excel and file and can convert in to MS data.
Or you can join to desitradermall and download the file in ASCII and can be easily converted to MS data