I've unchecked all the check boxes I can find that might cause popup messages to be generated yet I'm still getting them. An example is attached. How do I turn off all popups?

Thanks,
Don Washburn

Hi,
did you try:
Settings > Advanced Settings Button at Bottom > "Don't show Tray Icon Notification Balloons" (under General)

Thank you! I had forgotten about that switch. It did the trick.