Opening new score issues MuseScore 4

Hello everyone,

I have an issue about opening a new file on MuseScore 4. At the previous version as you already know when you open a new file it was opens on new tab. But in MuseScore 4, it is opening different program interface as if MuseScore 4 never never running. So when I tryed to work different scores at simultaneously there is more than one program running at the same time.

Do you have any solutions for this?
Thank you!