copy and paste the file somewhere else, like on your desktop.
You see those files that is gonna get replaced..Copy those and place them in a nice and safe place..Just in case something happens to the replaced ones.
Just make a new folder in your CF folder and copy both the HGWC folder and .exe to it. Then that's it, you have a backup. You simply need to recopy those files into the original folder if you ever need get them back.