As someone has noticed it is about the Advanced function. If you click and expand the Advanced function, the window will close and cannot be opened again, as long as it is docked with the other function windows.
Solution (temporary) is to un-dock it from the rest of the functions windows. Drag its name off to the artboard and when you release it, it will automatically open up in the Advanced state. If you want it back with the others just closed the Advanced mode and drag it back to dock it with the rest.
peterlomo
As someone has noticed it is about the Advanced function. If you click and expand the Advanced function, the window will close and cannot be opened again, as long as it is docked with the other function windows.
Solution (temporary) is to un-dock it from the rest of the functions windows. Drag its name off to the artboard and when you release it, it will automatically open up in the Advanced state. If you want it back with the others just closed the Advanced mode and drag it back to dock it with the rest.
Hope they fix it soon, this is such a drag ;)