In what folders does TwInbox store my messages?
By default, TwInbox creates several subfolders under the folder you specify for storing messages. If you expand that folder, you will see subfolders for each of your Twitter accounts, and under those, you will see subfolders for Home, Mentions, Direct and Sent messages. If you prefer to have all tweets stored in the same folder or separate folders created for each sender, you can configure that on the Preferences tab of the Account Options dialog. (Click Edit Account to access that dialog).