I managed to update my FW... Its a bit technical but download the FW and updater tool from : https://static.tp-link.com/2020/202003/20200324/M9v2_1.4.0.zip Original mention of this over here:...

I just want to say Thank you. I bought the M9 as an upgrade to the M5 but found it had less features (due to old firmware) than the M5.. The instructions will be quite difficult for a non techie but...