It's not a button, it's just a link:
http://blackswampglassworks.com/Elec...%20Booklet.exe
Here's all the info from my webpage:
You can now take a free peek at a portion of the 14 page electroforming booklet that comes with the kit! If you like what you see, you can purchase the e-booklet for $10 through PayPal. Just click the "buy this book now" link at the upper right corner of the e-booklet pages. Or, if you already know that you'd like to buy it, you can do so by clicking the button below, though I strongly recommend that you download the free peek first to make sure it works on your computer.
These are protected files, delivered as executables for PC users, and cannot be saved, copied or otherwise distributed.
***** Mac users, these files won't work for you. Please email me for an alternative method.*****