The missing maps has been a problem for a while. It's not a big problem or others would have complained.
Photo Mechanic Version 5.0, build 17146 (60130ac) on Windows 7 / 64 bit with all current updates
When the "Set GPS Coordinates" window is opened, the map is blank for about half a second, then the Hillsboro map appears for about half a second, then the map blanks. This sequence is repeated every time the set gps coordinates window is opened.
The "File/Import GPS Coordinates" map window behaves as expected. Attached are the screen shots, the first us "Set GPS Coordinates", the second is "Import GPS Coordinates: