To upgrade an existing QWT application to a newly installed QWT, you have to adjust the application's pom.xml file. The QWT version is usually defined by property like the following:

<properties>
  <toolkit.version>0.2.0</toolkit.version>
</properties>

In order to switch to a different QWT version:

• adjust the property toolkit.version
• rebuild your application

If you don't use the toolkit.version property, run mvn dependency:resolve to check library versions used by your application. In order to switch to a different version, you have to adjust the dependency and plugin versions whose groupId start with org.qooxdoo.