Help with downloading GnuPG

[Judi Caruso]

Hi,
I am taking an IT class and learning about encryption. We were given 
instructions to download the add on for Thunderbird/Windows Vista  - 
GNUPG/Enigmail. Everywhere I have search has lead me to www.gnupg.org  
where I don't understand how to download in the binary fashion or what 
that means.. in terms of this program. I do not see a download button to 
click.   I am sure it is something easy but I don't see it could you 
help me get started with a download for my computer...
Thank You
Judi Caruso