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[0.6.0-rc.1] Serial and USBSerial1 not working at same time on Windows 8.1 Pro #1089
v0.6.0-rc.1 has an issue with the new HID driver that allows for Serial and USBSerial1 to work at the same time over one USB connection on Windows 8.1 Pro. It works fine for Mac and no drivers are needed.
Targeting v0.6.0-rc.2 for a fix on this one.