right, i went to a place in sheffield and teathered my phone to ipad and got the map of the area. did two flights and went home. when i load up my dji go app the map is still there from the flying area and it wont get my new location (at home) how do i get the map to update to show my new location, i press the home button and it just reverts back to where the map last saw my bird. do i need to uncash the map if so how do i do it.