Unable to upgrade from 3.2.0 to 3.2.1.M1 - conflicting dependency of jBPM

Cannot complete the install because of a conflicting dependency.
  Software being installed: jBPM 4 Tools Runtime 4.0.0.v20110506-1208-H111-M1 (org.jboss.tools.jbpm4.feature.feature.group 4.0.0.v20110506-1208-H111-M1)
  Software currently installed: jBPM 4 Graphical Editor and Tools 4.0.0.v20110215-1501-H35-GA (org.jboss.tools.flow.jpdl4.feature.feature.group 4.0.0.v20110215-1501-H35-GA)
  Only one of the following can be installed at once: 
    jBPM 4 Graphical Editor and Tools 4.0.0.v20110215-1501-H35-GA (org.jboss.tools.flow.jpdl4.feature.feature.jar 4.0.0.v20110215-1501-H35-GA)
    jBPM 4 Graphical Editor and Tools 4.0.0.v20110506-1208-H111-M1 (org.jboss.tools.flow.jpdl4.feature.feature.jar 4.0.0.v20110506-1208-H111-M1)
  Cannot satisfy dependency:
    From: jBPM 4 Graphical Editor and Tools 4.0.0.v20110215-1501-H35-GA (org.jboss.tools.flow.jpdl4.feature.feature.group 4.0.0.v20110215-1501-H35-GA)
    To: org.jboss.tools.flow.jpdl4.feature.feature.jar [4.0.0.v20110215-1501-H35-GA]
  Cannot satisfy dependency:
    From: jBPM 4 Graphical Editor and Tools 4.0.0.v20110506-1208-H111-M1 (org.jboss.tools.flow.jpdl4.feature.feature.group 4.0.0.v20110506-1208-H111-M1)
    To: org.jboss.tools.flow.jpdl4.feature.feature.jar [4.0.0.v20110506-1208-H111-M1]
  Cannot satisfy dependency:
    From: jBPM 4 Tools Runtime 4.0.0.v20110506-1208-H111-M1 (org.jboss.tools.jbpm4.feature.feature.group 4.0.0.v20110506-1208-H111-M1)
    To: org.jboss.tools.flow.jpdl4.feature.feature.group [4.0.0.v20110506-1208-H111-M1]