Beside a few bugfixes it comes with a new feature :

Busses & auxes now have separate outputs, which can be routed back to any input (so for exampe you can also route it back to the same bus/aux)

The green input on the right is just a placeholder to separate the buss/aux outputs from the main ones visually

Via a small blue LED below the aux/bus faders these can be disconnected from the internal mixing, so the bus/aux are only send to the new outputs.