I am on the latest Version and still have similar problems: On Mac (v6.1.1 direct) i can enter my PW but the UI still hass the encryption button. On the Android App (v7.1.4) i can decrypt for viewing the Note, but when i want to edit it i have to re-enter the password and it stays in the unencrypted view with the Message "failed to decrypt content". edit: On the webversion i can decrypt the text but i can not find a way of simply editing it. (Copy & paste will probably work, but that's just an annoying workaround). I feel like Evernote has some serious underlying issues with this.