TRK is not a sniffer application and it doesn't work as winpcap. Winpcap is a kernel driver that monitors traffic. TRK has no drivers at all. If you know what is sniffer, feel free to monitor TRK traffic.

We suggest you to check TRK on http://www.virustotal.com/ to be sure that TRK is harmless application.
Thank you. We will check it. IE9/10 are blocking all software that user can download from any site, except very popular sites. User needs to click that he understands possible problems and only then IE allows to download the .exe file. It's possible that Google did the same trust mechanism as Microsoft.EDIT: Google Chrome blocks downloading the software the same way it blocks access to malware sites. Why?