I bought my new tl-wpa7817 kit and started wirking fine. Once I logged in the tpPLC app I got a prompt to update the firmware of my connected extender. I got a rebooting finished succesfukky message and righr adterwards the connection is lost. The only LED that is lit on the extender's panel is the switch one, everything else remains off. I have tried qnd failed to pair the extender with adapter, to pair the extender with the router (WPS), and to hard-reset the extender. It seems that everything is frozen. 

Any ideas and similar experiences on how to by-pass the issue