The only successful method of backing up and restoring with 4.0B that I have had is to back up the data folder in the installation directory. Also i back up the .conf file located in the root of c:/, not sure if this file is needed but i back it up anyway. Import and export has been problematic. My data folder is 1G and my export file is over 400M.
Transferring my backed up data folder over the internet took forever…