Buy once run everywhere. You can use one license to run
<oXygen/> XML Editor or <oXygen/> XML Author on any supported
platform: Windows, Linux, Mac OS X, Unix, Eclipse etc.
An <oXygen/> v11 license
covers all the v11.x maintenance
releases. If you are interested to always have the latest version we
recommend the Support & Maintenance Pack (SMP) option. The SMP is
thought to be a cost effective alternative to upgrades.