Hi Crescendo,
Sorry to hear about that... this is pointing to Kontakt scripts crashing in the background for me, which is indeed very hard to track down.
Are you saying that this exact same setup worked fine in previous versions of VE Pro for you? Which ones?
Did you try to eliminate products one by one from your template, starting with the "less famous" ones?
In any case, you can send us crash reports to confirm: support@vsl.co.at
To document freezes/hangs:
=> Open Activity Monitor
=> Choose Vienna Ensemble PRO
=> Click the small "i" in the upper left corner
=> Click "Sample" in the lower left corner
=> Save the file and send it to us
Best,
Paul
Paul Kopf Product Manager VSL