Reflash and reinstall.

(IMO red pill mode should only be used if one is familiar with the debian package system and the use of dpkg and apt-get command line tools, and how to force-downgrade, how to fix dependency problems manually and so on. Even though I am very familiar with these concepts I haven't had my N800 in red pill mode at all (except once, for a test). There's just no need to, IMO.)