Can you describe exactly what you are doing? You should be:
1. Download the patch
2. Double click the downloaded file and run the installer. Make sure it installs to the same location as your FH is located, in the event you didn't put FH into the default location
3. There isn't a patch for FH+. No matter how many times you install it, FH+ will NOT be patched. It should get it's own patch soon though.