Hey dude, it's okay! Sometimes anti-viruses think certain things are a threat when they aren't.
This is my copy of the installer:
click hereI've scanned it for viruses and it is clean! I made sure of that. This is the installer that you would get from the Torrent or Web Setup. So now you don't have to mess with any Torrent or Web Setup stuff! Just download that, run it and it will install FeralHeart for you!
If you have any more problems then just post on this thread, it's easier to help someone when all the information is in one place! :]