Change user group upon expiration or unsubscribe

I am using user groups where those signing up for free registration are registered and those paying for a subscription automatically switch to authors.

Is there a way to have a user with a subscription (an author) automatically change to registered upon subscription expiration or unsubscription?

I have User Groups assigned in each plan under Access - Subscribers User access level settings, and the free plan is the default (assigned as registered) which everyone gets if they don't have a plan (even upon expiration and unsubscription), but their group is not downgrading so I now have users that are free members without a subscription still listed as authors.

what version of joomla?
do you have a grace period set in your plan?

Unfortunately, this site is still Joomla 1.5. Grace period before real expiration is set to none.

Joomla 1.5 is just fine.

What CB version and what CBSubs version?

Sorry. CB 1.7, CBSubs 1.2.2 and Joomla 1.5.23

LindaGLS wrote: Sorry. CB 1.7, CBSubs 1.2.2 and Joomla 1.5.23

Please PM me the following information and I will take a look:

1 - backend url and superadmin access
2 - plan that is configured to upgrade usergroup
3 - test user that illustrates the issue.