Johnbee58
Hi
I'm just learning X3 Studio. I have the same issue with Sonar continuing to run in the background after I exit it unless I exit via the Task Manager. Just emailed tech support and they have no answers. This happens for me no matter what I use for drivers or even if I don't have a device connected. All I have to do is open a project, old or new and try to exit through the File menu or X in the upper right screen. The only thing I don't like about this is that in this way, you're not asked if you want to save your changes. I guess it's a bug they have to fix.
John B.
IN MY CASE - Re-installing ASIO4All fixed my particular problem. IF You have asio4all and symptoms are the same as described in my posts Try uninstalling asio4all and then re-install it.
if you know how, dump the process and run a windows debugging session over it and see if the stack compares to mine. if so try also using this to further diagnose
http://msdn.microsoft.com/en-us/library/windows/hardware/ff540592(v=vs.85).aspx You may want to try also
preferences->midi->devices->outputs uncheck Microsoft GS Wavetable Synth that is if you have it checked