The editor only sends and receives SysEx messages. In order for the plugin to function correctly, the Global parameter « Ctrl Send » has to be set to « SysEx ». If not, the editor will not react correctly to all of the parameters you edit on the Blofeld synthesizer. Below is a picture of the « Global » page showing the right parameter to use.
Refer to the Waldorf Blofeld documentation for further information on how to change global parameters.
Please note that only Device ID 0 (00h) is handled at this time. It is not possible to control a Blofeld with a different Device ID.