Feral Heart

alright, so i had FH for a while but once i found out about FH+, I uninstalled FH, and then installed FH+. I played it for about two hours, and then i got that "black background but you can see your character" thing. It really bothered me, plus i couldn't find anymore portals to different places in FH+, so i decided to uninstall FH+ and reinstall plain old FH.
Once i uinstialled FH+, i went to official downloads and then went to the FeralHeart Game Setup, and clicked Download. Once the popup came up, i clicked run. And waited. Once it loaded up all the way, i clicked run for the verification popup. AND THEN this stupid pop up comes up saying : The Setup files are corrupted. Please obtain a new copy of the program.
i clicked ok. and then i went and tried download again. the same thing happened. so i try torrent, and i clicked open, and nothing happenes afterwards.
I even tried installing FH+ again, and there was some sort of error. so i restarted my computer and i tried again and it still didn't work.
if it helps, i have windows vista and i still have space on my computer.
please help!