I think I just had a similar problem with Cubase/Scaler2. Scaler did not recognize MIDI events. Cubase does. An update from 2.0.4 to 2.0.9 did not help either.
My solution was the following:
Completely uninstalled Scaler, searched for the PluginBoutique/Scaler2 folder and renamed Scaler2. Maybe deleting and saving works too. During the installation a new folder is created and it must be registered again. The settings were gone, so maybe save from Scaler before.
In any case it works again.
Hope for you too.