The first link in nickjhowe’s post was for the installer, but the link doesn’t lead to a download page anymore. But all Steinberg installers, old and new, including the latest LE8 can be gotten from the Steinberg downloads page: Downloads | Steinberg
Perhaps you just need the latest installer and not the Yosemite tool, I’m not sure. The latest installer is dated 5 months after the Yosemite Tool page, so the installer might already include a fix for Yosemite.