Thorntik

I heard that the English release for Trickster is coming out on the 24th. I wen to the website and was able to download the game file called FullPakTrickster.exe. It took about 45-50 min to download. Once it finished, I double clicked it to install the game, but when I did, it dissapeared off my desktop. It created a Rogue file called Killandclean which I can only detect by using Stopzilla. I downloaded it in Firefox. Can anyone tell me what I can do to make it work or why this might have happened?