@David-TP My special thanks again for your quick and clear substantive response to my message and the explanation and advice provided. My compliments for your excellent support.   Kind regards,...

@David-TP Thank you for the prompt reply. I have downloaded the 1.5.5. version and as I understand it can be applied manually using the "TP-Link WebManagement Page". However, this is not recommended...

Since September 15, 2022, firmware version 1.55 has been available for downloading on the support page of the Deco M4 with the intention of applying it manually. However, this firmware is not visible...