This needs a more granular system, that can feed your settings out to JSON or something similar, with the option of tarring/zipping up your mailboxes, or skipping the message archive if you're on IMAP (and you trust the host server to reliably restore your mail). This would let you restore just the bits you want to keep. It also would be useful for migrating profiles between operating systems (to/from Linux and MSWindows, etc). I expect this needs to be a separate utility, as integrating it into the main application would be a lot more work than a standalone solution.