Thank you very much for this quick update!
I still got the "Class not registered" error on Windows 8 Pro x86! Impossible to make Iron my default browser without having troubles! Every Chromium-based web browser managed to fix that problem, except one of the best of them, that's to say Iron! Please consider taking care of that quickly, it's the only one thing that prevents me from using it as default browser
Keep your good work up, I'm sure you'll succeed into fixing it soon, if you take the time to help Iron working correctly on Windows 8 ^^