Hi Andy and Catas,
Sorry – I didn’t see this thread.
Andy: Levels generating black images: do you think you could share an image with me with the problem? I haven’t seen this in my own testing. There is a dropbox upload link you can use: https://www.dropbox.com/request/URZ12srbCokrdYn4I0gE
Catas: I think I found a bug with exporting which causes excessive memory use. I plan to have a fix for that soon. Hopefully that addresses the problem.