Ribon Bar - can't add button to MiniToolbar

Hi

I'm trying to add a new button to existing MiniToolbar at Ribonbar. Ribonbar doesn't show newly added button, because after adding i'm call:

Call CommandBars.LoadCommandBars(...)

When I change registry key of commandbar settings then new button is added correctly (CommandBard can't load old settings, then starts at default), but I'can't do that because I don't want to loss configuration of toolbar.

How can I add a new button to MiniToolbar without losing old configuration?

Thank for answer,
i-spy

Thanks for quick answer.

If I add a new button after  LoadCommandBars call, New button will be displayed always, even when user change toolbars configuration. I just want to add a new button once then at next application run use user configuration.

Ok, I will try solution with configuration version

Thank you