File "Electrum-3.2.2-py3.6.egg/electrum_gui/qt/main_window.py", line 3023, in closeEvent
  File "Electrum-3.2.2-py3.6.egg/electrum_gui/qt/main_window.py", line 3030, in clean_up
  File "Electrum-3.2.2-py3.6.egg/electrum/simple_config.py", line 141, in set_key
  File "Electrum-3.2.2-py3.6.egg/electrum/simple_config.py", line 150, in _set_key_in_user_config
  File "Electrum-3.2.2-py3.6.egg/electrum/simple_config.py", line 217, in save_user_config