As far as I understood it, the hcwirBlast.dll was part of Hauppauge's older WinTV program. So it may well be that they do not have a 64-bit version. I can not find any info on their web site. If you go to their Support page and choose HD PVR 2, you will not find any mentioning of IRBlast. But if you choose the older device, HD PVR, you will find, under Windows Driver tab, IRBlaster configuration program. I don't know which program will install hcwirBlast.dll.