Hi,
Right click on toolbar -> Customize -> Add New Toolbar Categorize and add what you want. See how I made it for me.

I'm missing the rating/stars button in the toolbar (to easily rate a whole bunch of songs). MM3 did have it. MM4 standard toolbar has got the "send to.." button (same entry as the one you can find in the context menu of a selected song). But even the toolbar customization dialogue doesn't offer the rating/stars. Is there a way to get it there?