There, yes. And the setting is probably mirrored to the system settings, so just focus on the adapter settings.
Yes and yes.
The DNS server settings are on the Specs page.
So you enter 10.4.0.1 in the v4 settings, and fde6:7a:7d20:4::1 in the v6 settings.
The thing with Windows is that you need to change them back manually, too. It can be done with a script, too. If you're interested, me or someone else may write you something.