Sometimes it helps to forcefully close and re-open the app to reset things. This is called "killing the app" - but it's pretty easy (and not at all dangerous).  

  1. Go to settings on your Android phone
  2. Navigate to Apps
  3. Navigate to the GOFAR app
  4. Tap GOFAR and you will see some options
  5. Tap on the option labelled as [Force Stop] to close the GOFAR app

After doing this you will typically want to reopen GOFAR.