In terms of content it will all download when you reinstall and your raveroom account/profile will be exactly as it was. In terms of personal settings, just backup the raceroom folder in your documents folder. That contains all your control setups, sound settings etc etc. Copy paste them back into place on your new install if required....
Back the folder up to a usb stick or Dropbox or whatever, or just plug in the harddrive and grab anything you still need from it....