You can either
- upgrade your Zelix KlassMaster version (i.e. upgrade to the latest version) or
- upgrade Zelix KlassMaster your license type (e.g. increase the number of machines covered by your license).
Version Upgrade Policy
If you license a copy of Zelix KlassMaster
We notify subscribers to the Zelix KlassMaster Announcements mailing list when major new versions are released
but we do not automatically e-mail upgrades.
If you are entitled to a free or reduced cost upgrade please send an e-mail to
quoting your Zelix KlassMaster license number1. Your upgrade will then be e-mailed to you.
Otherwise you can purchase a Zelix KlassMaster upgrade using a secure online order form via one of the following links.
Again, you will be asked to quote your existing Zelix KlassMaster license number1.
- you are entitled to a free upgrade to any subsequent minor release. So, if you license Zelix KlassMaster 5.5.0 then you are entitled to a free upgrade to versions 5.5.1, 5.5.2 and so on.
- you are entitled to a free upgrade to any major release that is released within three months of the purchase date.
Your Zelix KlassMaster license number appears on the initial "splash" screen when you start Zelix KlassMaster in GUI mode and in standard output when you run a ZKM Script.
Upgrade your Version to Zelix KlassMaster 5.5
Upgrade Your License Type
(* A site license allows you to use Zelix KlassMaster™ on any number of machines at one physical location. "One physical location" means one building or one contiguous group of buildings.)