More info on the GPS setup window. Select your GPS's COM.
If the button "Search" is active, simply click on it to NoniGPSPlot research settings in Windows.
Activate the GPS.
If your settings are good, you should see the GPS time : 161309.000
Then the list of visible satellites (30, 05, 06, 14, etc)
The, in blue, the list of used satellites for fix (05, 06, 02, etc)
After the position acquired, you should see the coordinates at the bottom of your main display.
you can have a look at all menus to have an idea of all possibilities of NoniGPSPlot.