To use the Inventory manager TSInventory, you will need one license key per installation (Standard-Version). Each license key is associated with a unique registered user and will not work for any other user.
With one license key (Pro-Version), you can use TSInventoy on multiple computers, as long they are all using a common database within a network.
Once you purchase a license, you get free upgrades of TSInventor for 12 months from the date of purchase. You only need to upgrade if you need new features of the new version. All existing features of the version you installed will work with no expiration date. As a customer, you are entitled for special update pricing for the next major version of the inventory manager TSInventory.