Open File opens a new instance (MU4)
Environment: Windows 11 Home, v10
Situation: Just downloaded new MU4 version, comparing with MU3.
Issue: There appears to be no option to open a file in a new tab in the current instance.
1. With a score already open, click File > Open...
2. Select a score file and click Open.
Result: A new instance of MU4 opens with the selected score active.
Expected behavior: File > Open should open the selected score in a new tab in the current instance. If I want a second instance open at the same time, I should be able to right-click the taskbar icon and click MU, like any Windows app.