There is now a quick setup guide available in a pdf format. You can download it here.
If you experience an issue with your In/Out device, first visit the troubleshooting and On Court Troubleshooting pages. Then fill the support form through the In/Out helpdesk.
If you don't own an In/Out and have a question, contact the In/Out team.
The support website is organized around five categories: Hardware, Software UI, On Court, Firmware Upgrade, Companion App.There is also the Logs and Roadmap.