OK.... solution found: it never flashed or reverted to the stock firmware. And when accessing 192.168.0.1, I was directed to a C20 router in another network. Funnily, the login and pw were still...

Hello Carl, Thanks for your reply. I have tried both versions on that page: https://static.tp-link.com/2018/201805/20180518/Archer%20C7(US)_V5_180425.zip...

Hello, I am trying to revert my Archer C7 v5 to the manufacturer´s firmware and need the firmware package. But when downloading the zip package on...