You'll face this problem again in a few days if the culprit is not found. The good news is you can start plucking them one by one next time to see which it is.
It seems you're having some licensing issues. Your first try should be to remove all plugins from the X-Plane/Resources/Plugins folder except for the X-Aviation one. Then see if it works after that. It's likely one of these plugins has an old DLL overtaking cURL.
Ah, so if you're finished with the ATS you need to press the ATS disconnect button. The binding is CL650 \ pedestal \ throttle \ auto-throttle disconnect.