The latest version of Adobe Shockwave is 12.1.8.158, which was actually released on April 22. The release notes don’t even mention it.

You can check the version of Shockwave on your computer by going to the Windows Programs and Features control panel, where it appears as Adobe Shockwave Player. Alternatively, you can check your browser’s add-ons: in Firefox, Shockwave appears in the Plugin list as Shockwave for Director. You can also check the installed version and install the latest version on the Shockwave Player Help page.