Hi Gary, the latest release of the jBPM Designer is 2.1 and available on sourceforge: http://sourceforge.net/projects/jbpm/files/designer/designer-2.1/. We have added a couple of bug fixes since the release which you can get either by building Designer from source (clone https://github.com/tsurdilo/process-designer and run "mvn clean install) or get the latest war (2.2-SNAPSHOT) from people.redhat.com/tsurdilo/designer/master.
You don't necessarily need to upgrade Guvnor as Designer works with both Guvnor 5.3.x and 5.4.x (and 5.5.x for that matter). If you are using the jBPM 5.2 Final installer you can edit the $installer-dir/build.properties and change the version to for example:
designer.version=2.1-jboss7
designer.url=http://sourceforge.net/projects/jbpm/files/designer/designer-2.1/
if you are building from source, change it to
designer.version=2.2.0-SNAPSHOT
designer.url=
and copy the $jbpmdesigner-dir/target/process-designer-2.2.0-SNAPSHOT-jboss7.war to $jbpm-installer/lib/designer-2.2.0-SNAPSHOT.war
and after run
ant clean.demo
ant install.demo (or ant install.demo.noeclipse)
ant start.demo.noeclipse
Don't forget to clear your browser cache before start using a new Designer version.
Hope this helps.