I have used mphidflash with the RFIDler before, but no version is currently working for me.
Sometimes the mphidflash connects to the board, sends the firmware, but it just ends up throwing "mphidflash Error: Verify failed".
Other times mphidflash just hangs after displaying "USB HID device found".
Is mphidflash working for anyone else?
I also downloaded the Microchip tools accompanying App Note 1388 - http://www.microchip.com/wwwAppNotes/AppNotes.aspx?appnote=en554836
But the Windows software does not support the HID bootloader. (It appears to support serial, virtual serial port over USB or ethernet bootloaders only.)