Here: https://smarthome-forum.eu/filebase/index…4-shelly-flood/
it states that the FW of December 14 2019 is the most recent so you might allready have the most recent FW installed.
Did you try to configure the Shelly to use a fixed IP- adress or to get it assigned of your router?
Unfortunately that is already the version that is installed on the flood.
I tried using a fixed IP by DHCP. Do you think it is worth having the fixed IP configured directly from the Shelly?