Look here:
http://www.conitec.com/english/gstudio/faq.htmThere you can see prices and differences between Gamestudio version. You will see, that you do not need the pro edition. Com is enough even for ambitious projects.
WED is a WYSIWYG editor.
Maybe your father gave you accidentally the wrong version since A6.22 Pro is an old buggy beta version and therefore does not come with Username and Password.
So ask your dad to give you the right version or buy it yourself.