I recently created a 2.0 online account and would also like to have the flexibility and backup of having a local account with my key file saved to my Mac. To do this, do I need to register again with Boxcryptor with a different username and then select the local account option? If so, would I then use my existing online key when setting up this account? Where will my key file be saved on my Mac and does the key ever change as I use Boxcryptor in the future? Sorry for all the questions but I really want to understand this so I don't lose access to my files ever.