No midi output in Musescore 4

I have two versions of Musescore: 3.6.2 and 4.2.1.
In MS 3.6.2 midi input and midi output are working properly without pronlems.
In MS 4.2.1 midi input works also OK, but midi output does not working. In section Properties are midi input and midi output defined, but definition for midi output has no effect on output process. I mean that problem is in output process pipe. In MS 4 is impossible to redirect output from internal sound MS synthesizer to midi output of operational system of computer. For instance also in mixer window you can see only MS Basic instruments (or other installed sw instruments).
It is necessary to supplement in MS 4 the output switch between internal sound synthesis and midi output port.