[Easy Blogging] Set easy mode as default for only *first* time user logs in?

I'd like to have Easy Mode as a default for the first time a user sees the back-end WP dashboard. I think that is important to not scare noobs away. However, I do not want Easy Mode to remain as a default if the user has chosen the regular interface. Is this possible?

Here is what I do:

- I have multiste enabled
- I have "force 'easy' mode for user with this role" unchecked for all roles
- I have "Hijack start page for new users" checked

The first time the site admin log in they see the Easy interface - great. But then if they choose the advanced interface, log out and later log back in... the easy interface comes back up. They cannot seem to "graduate" to the regular interface and have it stick.

Is there a way to accomplish what I need? I would think the default behavior for the system would be to remember last used mode and default to that whenever the user comes back.