Perform the download and install process of BKF Recovery software following the link and steps provided
Follow the path Start » All Programs » BKF Recovery Tool » BKF Recovery Tool, and get the software launched on the system with the first window appear like the below given panel
Windows thus opened will be provided with two options as Quick scan, Deep scan & Range Based Scan select the scanning option accordingly and enter into the next screen
Browse for the corrupted BKF file and once the BKF file is selected from saved location, open BKF file and let the tool start scanning process
Entire BKF file scanned will be shown in the tree structures preview table and to view particular file, right click on the file and view data inside it
Now go for the Extract button to extract and restore BKF file to desired location in the system