The FeralHeart Set-up should be located in your Downloads. If not, you can always download it again through the download section of the forums. Your FeralHeart folder, however, will or should be located in Local Disk(C:).
If youre having trouble opening up the actual setup, you can always try opening the setup file as an Administrator by right clicking the icon on your desktop and secelting that. Could work. Also try right clicking the setup and going to properties/compatibility then there should be a dropdown box, try selecting ehatever service pack you are using. If thr game itself won't open, again, try what I told you c:/font]