There should be an icon at the top next to the piano roll, sequencer, etc to bring this back up on your screen. When you roll over it with the mouse it should say in the upper left "view browser plugin picker" click it and it should appear, then drag it to where you want it. Go up to the top click on view and make sure browser is checked. It should now stay this way when you close FL. If it doesnt set it back up again and save it as a custom template...boom..done.