Open New Project Window doesn't seem to work

According to the manual it’s possible to open a new project window (Cmd-Shift-T), but it doesn’t seem to work.

You should see the shortcut under Window>New Window.

The Key Command is “New Window” too.

Maybe you don’t see it, because you have Dorico in full screen?

It was greyed out, along with almost everything else. But I’ve closed Dorico and reopened it, and I can now use the command and it has worked. I guess that Dorico must have slightly crashed. Thanks Nukkul (again!)