To use this feature, first you need to setup a master password in the preference screen. Then, you can make your notebooks private using the "lock a notebook" item under the notebook menu. After a notebook is locked, accessing it would require the password you created earlier.
This feature has been requested by quite a number of users, so I got it implemented in this version. Hope you find it an useful addition. :D
- New feature: notebook password-protected lock
- Fixed a potential error