The Virus warning (Trojan) also popped up with yesterday's defintion update of Kaspersky Antivirus 7.0.125. Today's update no longer has that issue. It seems that EXE-files created by installer programs are likely to give false positives. I had such false alarms with different fan-made mod installers using different anti-virus programs (Kaspersky, AVAST, McAfee). The key to not having to re-download the mod-file is setting the anti-virus program to ask what to do when a potentially infected file is found instead of letting the anti-virus program decide automatically to 'disinfect' or delete the file.