I happened to look in Task Manager (Win 10) and noticed that Smart SDR is listed twice, once as SmartSDR-Win & once as Smart SDR. The entry shows a (2). Is this application running twice? I'm using an Intel NUC I5 and noticed that when I run CW Skimmer, I'm getting near 100% CPU usage.
SmartSDR has two components. One is the main application. The other one is a message processor. When you get the popup messages, like when a different client connects to the radio, that comes from the message processor.