This means that primary extruder (T0) is reserved to print base plate only. That is why I was forced to use tool head index. Unfortunately, Simplif圓D (as of 4.1 version) does not evaluate variables inside conditions in tool change script. Go to 'Scripts' / 'Tool Change Script' and insert such code:
Finally, since we do not have multiple extruders with different filaments ready to be used - we need to change filaments each time slicer wants to change extruder.
