LR Preferences Problem. Under File Handling, in Camera Raw Cache Settings box, I change the Max Size from 1.0 to a larger number and close Pref. When I reopen Pref the Max Size is back to 1.0. I have tried deleting the pref files in Library, but still happens. I am using LR 5.5 on a Macbook Pro with 10.9.4. BTW, I have opened LR in a different user account on my mac and this problem does not happen.