It doesn't work that way - the packages file (used by the app manager) contains no temporal information. AppWatch also needs maemo.org for the ratings, screenshots, dates, etc (i.e. if it fails to retrieve details for a package it will not be visible, we don't want broken entries in the database). All in all, just a little patience and all will be back to normal when maemo.org/downloads and maemo.org/packages resurfaces.