Portland Tool & Die, Inc. BTC-4148-R41-PtdCsrFw - 10/15/2018 This release has the same firmware versions as R40, the only change is to update the PtdBcspDfu.exe program to allow updating older systems that have Melody-v5.5-RC10 installed in the BT module. BTC-4148 instrument firmware version 3.16 PtdCsrFw version 10.15 BTC-4148 command line interface(btcutil.exe) version 1.23 BTC-4148 windows installer v41 USB virtual communications port driver, version 1.0