The site has already been upgarded on your previous instruction. Its worth noting, if you couldnt get on the site, then he couldnt update anything in any case. You should be able to reset your password now
You would need to update your theme and any plugins/applications to the latest release, once upgraded. I will let you know once its complete, and you can then request a password reset again
Looks like an issue with installation there, as mentioned in your ticket. One of those has been escalated, so someone can see why you cant generate a demo