Yes if only I could turn back time I would do exactly that! I updated to A3 two weeks ago right after installation, and it's what I've been building the site with ever since. This morning was when I realized that it was the alpha version instead of the stable version!

The thing is, it's working basically perfectly, even after multiple people have joined and are using it. Since we don't have a backup, I believe the only way to get it running on the stable version is to start over again. Which would suck!