that's because it tries to send the PID/SN of the device when opening configurator (even though it d

that's because it tries to send the PID/SN of the device when opening configurator (even though it doesn't work which reminds me I need to make a FR to walmis to allow passing the device details via args to configurator). Since you are trying from the master instance, and there is no device, it is (silently) throwing an exception because there is no SN. If you showed the child instance window (pedals) and opened it from there, it would work.

No point in having the device information passed unless/until its supported by configurator so I'll fix that.
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