I wanted to do something simple: Add subscript and superscript buttons to the editor. The plugins for that are ready. When I drag the two icons from the middle to the right colum, I get a dialog where I can enter things. Nothings guides me what should be done there. After confirmation, I get the sub and superscript icons, this looks fine, but then the toolbar settings dialog refreshes, and the icons both vanish, leaving just a white question mark on blue circle and the text sub_1 or sup_1. And I cannot remove those icons, not by the suggested way of dragging them back, not by clicking on them and pressing "delete". I do get a dialog that asks me whether I really want to delete this tool. I confirm that, und sub_1 and sup_1 are still in the right column....
Thanks for any hints on how this should be used.