Today Kaspersky Internet Security 2011 found a Trojan in Winstep Ultimate Docking Software ( Trojan is Backdoor.Win32.Agent.azbc) and deleted the main exe file of the program. The same thing happened to Shiyon too.
The warning also says it is having PDM.Keylogger
I don't know whether it is a false positive or not. I have posted a topic in the Winstep forum here.
So I prefer those who won the Winstep Nexus Ultimate giveaway hold the installation until we get a response from the Winstep Team.