The steps to upgrade SoftSlate Commerce from one version to another are the same regardless of the version you are upgrading from or to. The process of upgrading consists of first upgrading the application's files on the server, and then running the Upgrades tool in the Administrator to upgrade the data objects in the database.
To find out which version you are currently running, go to the
Maintenance and Upgrades ->
Upgrades screen of the Administrator. That screen tells you the
current application version and data object version of the program. (You'll use this same
screen to upgrade the database objects.)
Unless you are in the middle of an upgrade, the application version and the data objects version should be exactly the same or unknown behavior may result, and a warning message will appear in the Administrator.