Restore xbmc from backup?

I have recently been testing xbmcbuntu using a USB stick, which works fine, but I had to get a larger capacity stick as the one I was using for testing was a bit small for future use.

Anyway, I installed the add-in for xbmc and backed up all settings etc to another drive but have now come to restore the settings, using the same add-in, but this time round selecting the restore option and selecting the backup location to restore from but nothing seems to happen and I cannot seem to find a way of restoring from the backup?

Am I doing something wrong here?

Any help appreciated.

Thanks