As far as I know you cannot rename a folder in File Explorer. You can rename it through a BR using SQL though - the table you need is called folder. Have a look at the MarketPlace solution File Explorer Manager - it allows you can copy folders. If you want to copy a folder from one application database to another and both applications are in the same environment, you can use File Explorer Manager. Copy the folder to the File Share | System | Contents, then go into the other application and paste it back from the File Share.
