@timp78 use the app to check. It will tell you if it's on the latest version. It's one of the few things the app will actually do. Still won't solve random no access to internet faults though. 

@timp78 think you are on the most upto date. I just can't get these things to work consistently. It's in AP mode and I've tried repeatedly to contact TP-Link but they are a total joke. Probably going to send mine back and buy a different make. Shame as i wanted mesh WiFi and powerline but constantly connected to WiFi and then lose internet.