New Following Tabs do not show for existing user

This is on a test build of the latest Release for Maximizer Live - 2025.9

Maximizer have added some new custom following windows under both AddressBook and Opportunity for our customer db.

The tabs do not appear for the single existing user on the database.

We added a new user and they do see the new tabs.

For the existing user it is probably that I have changed the user options via “Customize your tabs” via the + at the end of the tabs row at some point in the resent past.

I would expect to see the new tabs for all users either immediately visible or at least added to the "Customize your tabs" list unchecked so the user can check them.

Can you advice on how to make the new tabs available for the existing user or whether this is a new or existing bug?

Thank you