No database changes were made in this release so backing up your cookbook files isn't absolutely necessary BUT...  You should back up your cookbook files at regular intervals anyway and if you haven't done so in a while now is a VERY good time.

If you are currently a registered AccuChef™ user, you can upgrade to version 6.7 by clicking HERE to download the upgrade tool. It will download the upgrade67.exe upgrade program that includes the new version 6.7 along with a new compiled hmtl (accuchef.chm) help file, a new nutritional database (version 28) and supporting files. This is only for registered users that currently have 6.6 installed.