*Use a different browser to download it
but if that doesnt work, these are some thing I have heard of that could become problems:
If you have downloaded something (such as Norton=virus protector and whatnot) that would stop it from opening because it is something you downloaded from the world wide web, which (it thinks) is a bad place. Go through your computer and see if you have anything like that.
IF you do, then it will most likely have a history of what you have downloaded/what it has not accepted. You SHOULD be able to (either) get rid of the virus protector, and/or allow FH to be downloaded.
IF you dont have anything like this^, than I would suggest PMing a staff member who would know a little more about how it works.
Hope you find a way to download it.