Could you explain what you mean by this? Are you able to open the Corpus window?
Please click this link to enable some additional debug logging. Then try training one of the messages as spam. If the the message doesn’t move, please send in a diagnostic report via e-mail so we can investigate further.
That’s a configuration that should work, so if you want to use a local folder please continue doing so.
Could you explain this more specifically? What did you do? What happened? What did you expect to happen instead?