How to enable End-to-End Encryption (E2EE)

Visit the profile section and click the Security link. Click Manage button.

“Enable Encryption”. Please note: this option will not affect existing devices and data for your account. 

Visit the profile section and click the Security link. Click Manage button.
Open the Tools tab.
Click Backup Keys to download the backup file for your Master Encryption Key. This will allows you to access your data in offline mode and also restore access to your account in case you forgot the password.