Adding IP devices to an existing TP installation

[coolbox13]

I am using KNX since 2004 without any problems. Added a weinzierl IP gateway. Using KNXD via this gateway as multicast server. All working properly together with home assistant etc. Now I would like to add an esp8266 or esp32 with some logic, IP based, to my installation. When trying to import the demo project, ETS5 is complaining that the line medium is TP instead of IP and thus impossible to add a device. The ESP will only start doing something when configured in ETS. Catch 22 in this case. Anybody with idea's? (btw I can add the TP version of the demo project, but then of course is does not "recognise" the UART, which is not here of course..)