All current customers should have already received the E-mail notice about version 9.1 released on September 25th. If you are not yet a licensed user or you missed the announcement, you can read about the new features in the Release Notes:
http://www.campground-master.com/rel91/index.html
However, there were a few bugs found in the initial release, mostly dealing with the new E-mail features. Any known issues have been fixed and a new "9.1 rev.e" release is available as of October 9th (see release notes above for a list of the additional fixes since the initial release). Please check Help / About Campground Master to see if your version shows "rev.e" -- if not, we urge you to download the new version to replace your current version.
Networking note: This will not affect networking connectivity so they don't have to be done all at the same time like major releases do. Just install on each computer when it's convenient.