Max crashing Ableton with convolution reverbs (especially Envelop for Live) and wont open in console

Jon Rowden's icon

Max 8 crashes immediately and my Ableton projects become corrupted after applying a convolution reverb to a track. Tested the verb by opening in Console and it crashes that too. Especially bad with B format convolution reverb by Envelop4Live. I've changed to admin in Windows and gone through all steps to reset max, even reinstalled everything. It would appear that Ableton is having a hard time accessing Max based on crash reports. Does anyone have any idea what I can do? Any Windows settings suggestions would be most helpful