Rated 5 out of 5 stars

Works great. But the import-commands are a litte bit confusing. Exporting directories with subdirectories creates .sbd files. If you wish to import mail from such files, you need to choose "import mbox files". If you know that .sbd is a subtype of mbox files, then that might be clear to you (it wasn't to me, and instead I've tried all other import options. I think it would be a good idea to rename the command to "import mbox/sbd files" to help dummies like myself).