You basically have 3 options for sending folders:
- Use Chrome or Opera as your webbrowser
- Use Filemail Desktop. This is a small desktop program available for PC, Mac and Linux which you can grab here: www.filemail.com/apps.
- Compress (ZIP/Rar/7z etc) your folder(s) and send the compressed file. Grab 7z here: http://www.7-zip.org/download.html