You can choose the location on your hard drive that you want to download to, but you may just want to choose to download it to your desktop so that it's easy to find. Once the executable file downloads just click the icon on the desktop to start installing it. It's very easy.
Don't worry about the flash drive. It's not something you have to have or use, I just use it so I can use my fitday file on more than one computer. It's just a portable drive, similar to a floppy drive or CD.
The downside is that you can't make Fitday PC public, and if you've already done things on web-based fitday, you can't import them into fitday PC.
