Hi remkovanalphen ,
I upgraded my player to level 3 and wondered the same.
I played around and figured it out.
The way I did it was to go to the rig manager on my computer, select system, and assign a footswitch to morph.
Then with a footswitch set to morph, press the morph footswitch to activate, you will see the morph bar go to blue or toe position.
Now if you adjust the parameters of say drive level for example you see the orange and blue indicators around the parameter.
When adjusted hit the footswitch set to morph again and the settings will be stored.
Now when you trigger morph the parameter adjusts.
The rise and fall time of morphing can be set under the rig settings.
Note I am not using an expression pedal so this is how I have set it up and using morphing.
Hope this helps.
(Apologies I just read your post again and you were referring to setup with MIDI, anyway this still may help others).