Go to the bottom panel, right click and select "new panel" The panel should appear on top - but you can left click and slide it there if not.
Now right click on the new panel and select "add to panel" and a dialogue box will open showing the applets. Virtually everything that was on the original bar can be found there. Just be patient and it comes right back to where you
want it. Incidentally; you don't have to close the add dialogue until you have them all up. Then right click on each icon and select "Move" and position the icons where you want them. When all are in place go back and right click and lock them to the panel.
There ya go good as new!