Ground Control Crash on launch

GC does not crash when USB is disconnected. It crashes as soon as I connect the USB. I was able to get the last python message by launching from the command line:

Traceback (most recent call last):
File “C:\Users\Bar\Git\GroundControl\main.py”, line 502, in
GroundControlApp().run()
File “C:\Python27\lib\site-packages\kivy\app.py”, line 828, in run
File “C:\Python27\lib\site-packages\kivy\base.py”, line 504, in runTouchApp
File “C:\Python27\lib\site-packages\kivy\core\window\window_sdl2.py”, line 663, in mainloop
File “C:\Python27\lib\site-packages\kivy\core\window\window_sdl2.py”, line 405, in _mainloop
File “C:\Python27\lib\site-packages\kivy\base.py”, line 339, in idle
File “C:\Python27\lib\site-packages\kivy\clock.py”, line 581, in tick
File “kivy_clock.pyx”, line 367, in kivy._clock.CyClockBase._process_events (kivy_clock.c:7700)
File “kivy_clock.pyx”, line 397, in kivy._clock.CyClockBase._process_events (kivy_clock.c:7577)
File “kivy_clock.pyx”, line 395, in kivy._clock.CyClockBase._process_events (kivy_clock.c:7498)
File “kivy_clock.pyx”, line 167, in kivy._clock.ClockEvent.tick (kivy_clock.c:3490)
File “C:\Users\Bar\Git\GroundControl\main.py”, line 341, in runPeriodically
self.receivedSetting(message)
File “C:\Users\Bar\Git\GroundControl\main.py”, line 301, in receivedSetting
maslowSettings.syncFirmwareKey(int(parameter), value, self.data)
File “C:\Users\Bar\Git\GroundControl\Settings\maslowSettings.py”, line 628, in syncFirmwareKey
File “C:\Python27\lib\site-packages\kivy\config.py”, line 474, in get
File “C:\Python27\lib\ConfigParser.py”, line 618, in get
ConfigParser.NoOptionError: No option ‘propweightz’ in section: ‘Computed Settings’
[7128] Failed to execute script main