Same here. Changing while Print does not work after:
1.) Pause
2.) Change Material
3.) Ready --> Select PLA
4.) Now the Feeder should move slowly - but its only showing Cooling/Heating
Why do they don't test their Software before Release? I mean, this is a Main Function for huge Prints. I Can't make lagre Prints now until they fix this...
The first time i am very angry about Ultimaker. :(