I'm having the exact same problem. SA2 conflict is causing the DMXZone Behavior Connector to crash DW immediately when trying to use it.
Just discovered that if you go into the Configuration folder and temporarily move the ‘Validation Toolkit’ folder (inside Behaviors/Actions) up one level, the DMXZone Behavior Connector will then ignore that folder when it starts up. I haven't experienced further DW crashes so I'm assuming this folder is the root of the conflict.
Jason, if I'm totally off with this theory, please correct me. Or if there's a better workaround please pass it my way. Thanks.