On the Magical Jelly Bean Keyfinder website, scroll down to the bottom of the comparison table until you see the Download links.
Click the Download link to the left, under the word Free. This is the download link for the latest version of Magical Jelly Bean Keyfinder, not the other for-pay program being offered.
Advanced Note: If you'd rather use Magical Jelly Bean Keyfinder in a portable format, you can scroll down a bit more and instead use the download link labeled Download ZIP v2.0.8 (340 kb). If you do choose to do that, uncompress the ZIP file, run the executable, and skip to Step 12.