Hi,
would be nice if the signature can be included in the installer, so one does not need to download all them after upgrading, but only the differences. This is even more useful considering that some does not have internet access (or when a virus block the internet access).

Since the very recent version 0.90 thats how updates are done, by just adding the difference.
As for the offline updating, you can download the database and then copy it to your database folder.

Al968