The program freezes.
The program may not be able to handle extreme geographical locations such as beyond the Arctic Circle. If the program freezes, it may be best to contact the developers for support or look for an alternative software that can handle such locations.
Did you try to enter you Lat / Long manually ? Enter the name of any big city and it will throw a few options to select the Lat / Long. The final option would be "I'll enter manually". Use that.