it's really a good software.I can use it totally fine before update.Since I update there is something wrong.I am still able to open mp4 files, I can hear the audio but can't see any video frame on the window.

Can't confirm, upload some sample to test.

Anyway, I have some problems, freezing, no nav bar and so on, sometimes only, occasionally from this version.

IIRC from that version default video renderer is "Built-in Direct3D 11" and not EVR.
I've seen some white screens myself while stopping or fast forwarding. Even so I thought that it is problem with Intel iGPU driver.