I am using Picolog 5.23 (downloaded last Thursday).
I've done a few more tests:
# Using your procedure (Ethernet settings, unplug, plug), the software detect the device but then crashes the same when I click OK. Auto reconnect doesn't change anything as far as I can see.
# I've also tried something else: I've configured the Pt-104 and then I've connected it via USB to anther computer (with no Picolog software on it), to act as a USB power supply. I connected the Pt-104 through ethernet to the PC with the picolog software on it. When I then set the input as "pt-104 (ethernet)", the device appear in the list with the address I configured. When I click "status", it says that it cannot show status for disconnected device. Till now it is the same. When I click OK though, instead of crashing, the software hung a bit (~5 sec) and then the "input channel" window closes. When I open it again, I can see that the input device is now "demo". This is reproducible.
In both instance, when I select the device as "pt-104 (ethernet)", the "Port" drop-down menu is not enabled; is this normal?
I don't what is wrong. Are there some network parameters somewhere else I should have set?