How can I get DeepSjeng 1.6

I just downloaded and installed the updated version of Deep Sjeng from your homepage. I suggested to buy the new version 1.6 but the exe-files is still the old dated 12.02.2003 16:12

Start Deep Sjeng, the from the Help menu select "Help On the Web -> Check For Updates"
You will now be taken to a webpage where you can download the update.