I've been using version 9, all the previews and I'm now using the weekly builds they put out. All have been very solid. You have to go to the forums to get the weeklies and even the previews, but I think it's worth it. Version 9 also uses the Windows installer, so that's nicer. But I think you can choose where to install it regardless. And installing over previous versions will not mess up your settings at all.