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    How do you update firmware with PC UBS-midi cable?

    Hello, new to RJM board, new user, new purchaser. I have a Mastermind, and a USB-MIDI cable. Plugging into Windows 7 machine, also have Vista and 8.1 machines available, and Unix too. Have been trying to search for instructions. I know this isn't plug and play. Tried the RJM updater and times...
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