Hi Roger, must be quite an easy one, as I think even I can help you!
Go to File, select Preferences, you then get the menu of 4 screens, General, Radar Box, Home Station Data, and Map Colours.
In the Radar Box menu, bottom right corner, there's a tick box, whether to show the label "Home" on the display, I leave this unchecked. In the box below are your Latitude and Longitude + any label you wish to add. The Lat. and Long. are taken from the Home Station Data. Lat. and Long. are in decimal format, and if West of Greenwich 0, a - symbol needs to be inserted. Hope this helps!