I try to press in "Update" link in admin menu bar live version not local, i redirected to

http://www.wildbearcapital.com/update.php   and erro page appear

"Not Found

The requested URL /update.php was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request."

My question is: 1. how to update from admin panel? If this feature not works tell me please when it will start works?

2. In version history i found info about Alpha 3, is this already exist or you will plan it in near future?