Settings | Telemetry Settings
Ensure you have the latest version of the Desktop Application (v2.1.33)
Navigate to 'Configure Game' in the Desktop App and click on Assetto Corsa.
You should see that your game is already configured and ready to record sessions.
Drive a couple of clean laps, check the Desktop App and wait for your sessions to appear. Happy racing!
*If you have any issues recording sessions, please click 'Report Issue' in the Desktop App, and a member of the team will be able to assist you.