Ribbons, toolbars and menus are saved in the adaptation file athena.cui(x) and should not be changed. The adaptation file athena.cui(x) is adapted and expanded for each new ATHENA version. The user's own adaptations are therefore overwritten and must be carried out again.
If you wish to adapt your working environment, you should do this in a dedicated company/user adaptation file. You will find further information on this in the Chapter Adapt user interface.