[Dovecot] stupid migration from maildir+ to dbox

Hello. I'm install latest dovecot 1.2 from hg repo. I have many messages in maildir+ format. I migrate some folders to dbxo format using instructions from http://wiki.dovecot.org/MailboxFormat/dbox. But in two folders i'm delete index.cache and index.log files, this is my mistake. Is that possible to recover this files (regenerate) or use my messages from maildir with dbox? Thank You for any tips and help. P.S. Thank You for best e-mail software!