File "C:\Program Files (x86)\Electrum2\electrum\plugins\trustedcoin\qt.py", line 205, in <lambda>
    b.clicked.connect(lambda b, k=k: self.config.set_key('trustedcoin_prepay', k, True))
  File "electrum\simple_config.py", line 154, in set_key
  File "electrum\simple_config.py", line 163, in _set_key_in_user_config
  File "electrum\simple_config.py", line 244, in save_user_config