Now unzip the file. Open zip file 
; it will open with WinZip.
Depending on the version of WinZip the procedure can vary slightly. Select the file and click "Extract".
Provide the path where the file should be written and again click "Extract". Now the file is unzipped and available in the selected folder.
HINT: Instead of the Extract function to open the file, you can click bcbankenstamm with your left mouse button, drag it to the desktop and release the mouse button to drop it. This is another way of unzipping the file.