In oder to restart Colourlab Ai Server in case it becomes non responsive and plugin shows an error that it can't connect you need to follow these steps:
1. Hit Exit in the system tray to close the Server Configuration.
2. Navigate to C:>Program Files>Colourlab AI>bin>ColourlabAiServerHelper.exe and double click to restart the server.
3. Click on Open CLAi Server Configuration and you should see eveything running as expected