An upgrade is a major change of the system. An upgrade is represented by a change in the first two number groups of the version number. For example, a version change from PLA 2.0 to PLA 2.1 or from PLA 2.1 to PLA 3.0 would be an upgrade.
An Update is only a minor change of the system. For the PLA 2.x series a minor change is shown by the build number. For the PLA 3.x series a minor change is represented in the third number group of the product version e.g. from 3.0.0 to 3.0.1.
Customers with active PLA Support Contract get updates and upgrades to their licensed products free of charge. This includes updates and upgrades to PLA itself, but also to add-ons such as Bioassay Packages and Data Acquisition Modules.