I am using Bento 3 but have been unable to lock/encrypt fields. I have already created a password to lock the Database. I am able to lock the database but when I view what's listed as an encrypted field I have an option to lock Bento but there is no option to lock the encrypted field. The lock icon is missing. I have looked at the instructions but don't see what I'm doing wrong. Any idea of why I'm not getting this option? Thank you.