I'm sorry to hear you're having difficulties updating your headphones.
I would recommend trying a different Micro USB cable. Not all cables are created equally, some have only power wires inside for charging. The cable needs to feature data wires to allow transmission of information, in this case, firmware update information.
Is there a reason why you're trying to update the firmware? Are you having issues with the headphones?
Past updates for the AE2w include:
Released 15 Mar 2018
Improves Music Share performance
Resolves iOS ringtone volume playing louder than expected
General stability improvements
Released 5 Aug 2013
Resolves poor call performance when the battery is low