Cannot install ADE 3.0

I'm able to download the Installer from the adobe website for ADE 3.0. However, when I try to install it, a message pops up saying that the certificate has expired and asks if I'd like to continue anyway. So I do. After it's finished installing, a successful installed message shows up. But I'm unable to find ADE 3.0 anywhere on my hard drive. Only the Installer is on my computer, not the program.

How can I get ADE 3.0?

I'm having problems getting borrowed library ebooks onto my e-reader, and it's been suggested that I use ADE 3.0 and not ADE 4.5.

Thanks