It's more like buying a new car and discovering they haven't finished building it yet. And they haven't put the wheels on yet.
Regarding running the old and new versions side by side, that would have been made easier if the new version hadn't uninstalled the old one during its setup process.
I hadn't realised the new version was still in beta, or at least unfinished, since that is the only version available for download. I thought it was an upgrade. What are they trying to do, exactly?