I was curious what was up with Preferences too. Disclaimer: Changing p-list files is dangerous and will break apps. Just letting you know what I've found, I strongly recommend against changing anything, and doing so is at your own risk. I figured even if the preferences UI is missing, the app still needs to load settings. On macOS, an app's settings are often stored in p-list (property list) files under a user's ~/Library directory. Evernote's is at ~/Library/Containers/com.evernote.Evernote/Data/Library/Preferences/com.evernote.Evernote.plist. Running plutil -p ~/Library/Containers/com.evernote.Evernote/Data/Library/Preferences/com.evernote.Evernote.plist in Terminal will print (not change) how the app is configured, and those are likely the settings that the Preferences window would manipulate when built, until more settings are added. I don't see anything in there about spell checking, So I assume that's using the macOS system setting (System Preferences > Keyboard).