File "electrum\gui\qt\__init__.py", line 207, in wrapper
  File "electrum\gui\qt\__init__.py", line 233, in start_new_window
  File "electrum\gui\qt\installwizard.py", line 321, in run_and_get_wallet
  File "electrum\base_wizard.py", line 96, in run
  File "electrum\base_wizard.py", line 148, in upgrade_storage
  File "electrum\gui\qt\installwizard.py", line 497, in waiting_dialog
  File "electrum\base_wizard.py", line 141, in on_finished
  File "electrum\base_wizard.py", line 145, in do_upgrade
  File "electrum\util.py", line 367, in <lambda>
  File "electrum\util.py", line 363, in do_profile
  File "electrum\storage.py", line 377, in upgrade
  File "electrum\util.py", line 367, in <lambda>
  File "electrum\util.py", line 363, in do_profile
  File "electrum\storage.py", line 122, in write
  File "electrum\storage.py", line 142, in _write