someone (I think it's you
) already send us a message about this bug but didn't mention the crash. Don't worry, we are working on.
About the samples, if I understand well, you want that the layer showed in the instrument view is updated when you play the sound.
For instance, you have 2 samples you play the instrument witha low velocity you see the first, you play with full velocity you see the second.
Is it what you want?