This is an old (by over a month) thread that is now obsolete. If you've got Windows click on the "Download and Play Virtual Villagers 3 Now!" graphic link on the left.
I emailed the address on the link above (thank you arnie) for an updated version of the mac game about 2 days ago and have still not heard back. Is it usual? Or was there an updated set of instructions for the upgrade or is it on the web somewhere now so the email route is wrong? Thank you!
I got mine via steam, which auto-updates, so I don't know; can you not use these links? They link directly to a downloadable executable, which appears (guessing from the filename) to be a setup program.