41.7: Fixed KML import issues.
41.5: Added options to show grid lines and tracklog grid cell coverage on map. Removed obsolete Wear version of app.
41.2: Added the ability to show tracklog points on map, and also to delete a tracklog point by long-pressing it.
40.8: Updated to target Android SDK 33.
40.6: Added code to work-around the "week number rollover" issue for older GPS chips.