The Thinka can be restarted by pressing and holding the button on the front next to the Thinka logo until the LED flashes orange, releasing it and pressing to button once shortly. It may reboot multiple times if there is a major update.
In case something is not clear or not working according to your expectation you can contact us, and we will provide instant feedback. We can be reached by email at support@thinka.eu, or by phone at +31-20-2420666