There's a Help section - it says this...
To delete or restore files in the Recycle Bin
On the desktop, double-click Recycle Bin.
Do one of the following:
To restore an item, right-click it, and then click Restore.
To restore all of the items, on the Edit menu, click Select All, and then on the File menu, click Restore.
To delete an item, right-click it, and then click Delete.
To delete all of the items, on the File menu, click Empty Recycle Bin.
Peccavi, January 2010