Windows installation , login/password?

I restart my windows installation of Hass.io. But first, I have to insert my login datas. I don’t know it.
How can I reset my login datas to default? Or where can I find the stored login datas in my installation dir? What is the standard install-dir?

bye, Thomas

%APPDATA%/.homeassistant

By the way:

The Microsoft Windows platform is not a primary target to install Home Assistant. Also, not all tools and third-party modules will work.

How did you install Hass.io on Windows? Or, did you install Home Assistant on Windows?