Version 3.1 is a minor release with a few new features and bug fixes.
To upgrade to this release, you only need to install it over your current version. There is no need to uninstall the previous version. All previous versions will be upgraded automatically -- you do not need to install previous upgrades before this one, and all of your data and settings will be retained (except for the "demo" database file, which will be replaced with a new version).
Networking Note: Be sure that all workstations are upgraded at the same time (shut down all workstations, upgrade all of them, then restart them one by one starting with the master workstation).
Note: You cannot go back to using your database with a version of Campground Master once you start using this version, due to upgrades that are automatically made to the database. Be sure you make a backup of the database before installing the new version, in case you have any trouble.
Also Note: When you install the new version, the "demo" database (demo.prk) will be overwritten with a new version of the sample database. If you have been working with the sample database and want to save the changes you've made, then you need to load it and then use File | Save As to save it to a different name before installing the new version of the software.