It does work with x10hosting subdomains. We'll investigate why you're getting the "No License!" page.
EDIT: Can you try re-installing it now? We've made some changes on permissions.
It's working after a re-install! Thanks!
EDIT: Just sharing you that logging in into the builder doesn't work in (my?) FireFox Internet Explorer is working flawless.. Maybe someone else is also experiencing this?
EDIT2: *sigh* When trying to configure some options, I get a 403 error:
You don't have permission to access /admin.php on this server.