I would like option 1 - but I really am concerned about Cintanotes as a whole when it comes to security.
I do not use CN for sensitive subjects - since Edward Snowden and as a Security Now subscriber I worry about privacy of my notes - now SpiderOak have announced a zero-knowledge note-taking product, I will consider that when launched.
If you don't use syncing, then CN's security should be ok for you. It uses AES-256 for encrypting whole notebook file.
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