Simulating boards with multiple layers in QUCS Studio

[ftg]

As it says on the topic, has anybody managed to simulate multilayer boards in QUCS Studio
Like 4-layer boards with traces in the middle layers or openings in the layer 2 copper under pins in SMA edge launches?
Even the different Er in the prepreg and core seems to be undoable?

I would have asked on the QUCS Studio forums, but the registrations there seem to be closed, likely due to the tons of spam.