Apparently it's not yet compatible with Windows 10.
I have downloaded the application on a Windows 10 computer and it worked quite well. I have used the only download available on the official website. There were no advanced configurations in place. I have unpacked the archive and launched the software it worked. The only thing I did was to use Run as Administrator to avoid other issues and that's it.
Download page: http://www.bigbangenterprises.de/en/doublekillerpro/