Windows System Files:

FFA will install some system files in your WINDOWS\SYSTEM directory.
If your system already contains any of these files and they are different,
you will be prompted whether the existing file should be replaced or not.
If the prompt indicates that your system has a NEWER file, then you should
NOT replace that file, since other programs may depend on the newer version,
and FFA should work ok with the newer version. If it says the existing file
is an OLDER version, then you should replace the file.  

If you are going to replace any system files, if you don't have those files
backed up, you should probably abort the install and back up the files to be
replaced, and then run the install again.