This morning i upgraded my electron. first to the 0.5.3 then after that was complete upgraded to 0.6.0 as the it was required to flash my code however after i completed this in my device list it still says (under my device is) that the firmware version is 0.4.8 and will not let me flash my code.
Try to put your device into the Listening Mode. Push the mode button for a few seconds until the led starts blinking blue. Connect USB and then try “particle identify” followed by “particle serial inspect”. This should reveal the current state of your device.