Theme doesn't get locked after downgrading Pro Plan

Hi there!

We have Pro Sites and Theme Manager installed, and we just realized, when an account downgrades it's plan, theme settings are kept the same.

In this case, we offer our best plan 60 day trial, so people have to pay to continue using or change to the free plan (we are not using the standard free site, we created a plan of 0$/month.)

We seen that people who downgrade to the free plan are still able to use one of our premium themes (as configured on theme manager).

Can you confirm is this is a miss configured setting or its something the plugin doesn't handle?

How can I force downgrades to update theme and change if there are not enough privilegies?

Thanks for your help!