I have made several customization into different gui DGNlibs. In one of them I made a typo, which now appears in every ribbon where this button is used. I have it changed in the appropriate DGNlib, but it still appears telling me it is coming from another DGNlib where I earlier had deleted this item from the Ribbon. Now scrolling through all these DGNlibs and customizations I see a lot of old and sometimes mistakenly made buttons, tabs and groups and now I think one of these old items is preceding over the one I need. Is there a way to clean up unused customizations from DGNlibs?