Help with unencrypting notes

Operating system

macOS

Joplin version

13.0.7

Editor

Markdown Editor

What issue do you have?

I have been using Joplin for a few years with hundreds of notes. I just got an upgraded iPhone and after getting the new phone to sync with my Joplin account (via Dropbox), all my notes showed up as '"encypted" which never was the case with previous phones or my desktops. On my desktop and previous iPhone, the configuration>synchonisation>encyption Config settings are set to encryption is: disabled. There is an orange band on top of the screen "press to set the decryption password. When I press it, I am taken to a screen the shows encryption is disabled, master password is: loaded. The options are to: enable encryption (which I don't want). then two boxes for Master Keys passwords (which I don't know or ever remember setting. How to I unencrypt my notes?