Noticed slow performance while saving FLAC files. Picard had been open over night pending changes to be saved.

Traceback (most recent call last):
  File "tagger.py", line 17, in <module>
  File "tagger.py", line 1578, in main
  File "tagger.py", line 760, in run
  File "tagger.py", line 736, in exit
  File "util\pipe.py", line 470, in stop
  File "util\pipe.py", line 416, in __close_pipe
pywintypes.error: (6, 'CloseHandle', 'The handle is invalid.')