Updated to Classic. It crashes each time I close, whether asking to test integrity and optimize and save when exiting, or even when asking to 'skip' these steps and close. Confidence is low that changes won't be lost, so can't really use this upgrade until this is fixed. Crash reports sent each time. Win7Pro SP1, 64bit, GPU acc is off. No problems with the last 2015.12 release. I need the latest (Classic) to support a new camera. Thanks.