Preview 2
I also have a problem. I installed preview 2 (Oct 29). I was able to full disc copy a BR. Then, when I tried to use "write data" it hung for a few minutes while I had selected the folder that contained the rip. I then had to force quit the app. When I restarted it, it was bouncing, like the OP has said.
I deleted, rebooted, reinstalled, and same problem. It bounces forever and won't start again. I looked for the preference files, but could not find them. I would have tried to delete them.
I was considering a lifetime license, but not if it won't run...