You can go to mysitebuilder.org/kopage.php and install your website from there. That’s a Kopage installation which is linked to our web hosting cluster.
But a VERY BIG WARNING: there is a reason why this link is not shown in the control panel or client area - the builder is very broken. Expect it to crash and break down in many mysterious and exciting ways. Don’t go complain if it doesn’t work. We know it doesn’t work, that’s why we hide it as best we can. Use it entirely at your own risk.