Once you’ve become used to using tabs to browse your files and folders, there’s no turning back. Productivity dives.
So, I’ve found an alternative: Nomad.NET.
It’s not as pretty as QTTabbar and doesn’t do things quite as intuitively either, and there are certainly a couple of glitches when trying to open the downloads folders from Chrome. But it certainly beats using windows explorer.
If you’re a tab fan, give it a try. It’s free and can be downloaded from: http://www.nomad-net.info/downloads