Random aircraft on global chart

I am really new to Navigraph so just getting into it. I would like to solve this irritating problem as I go please. Every now and again, perhaps 4 or 5 times per hour, the chart window randomly re-focuses on an area in airspce DGAC off the east coast of Africa and the icon is what’s used elswhere as an aircraft. How can I get rid of this? Also, although not as important, is there a way to delete all the pinboards and airports etc., I have only found ‘Unload’ and the usual ‘X’ on some items.
Thanks for any help.