SpaceFinder

On the official website, look into you profilescreen. There is a download button

yes. Alpha and Beta are testing-phases for the devs. So you will have to restart after release

All three available pledges allow you to play while servers are online. So choose the one you like. Servertest today is 3 hours long. On 11. June the supertest starts(28 days). So no, the servers are not always online. Reference: https://www.dualthegame.com/en/server-status/ To the question about Gamepad and Xbox pad: I don't know.

Welcome to Dual Universe!

If you mean the login ingame: The servers are currently offline, so it is not possible to join the servers. You need to wait till the next Alpha-test starts. https://www.dualthegame.com/en/server-status/