During updates of MiWorkplace sometimes UI elements (like menu entries) will be added to or removed from the application.
As MiWorkplace is based on Eclipse e4 technology it also inherits its weak points. Updating the application is to some extent still a weak point. See “I modified my App.e4xmi/fragment.e4xmi but the changes aren't being loaded. Why?” at Eclipse4/RCP FAQ.
So to get the state of the application updated with the new elements from the update the persisted state of MiWorkplace needs to be cleared so that it can be rebuild again. This can be achieved by adding the parameter “-clearPersistedState”. So if you started the application like this
/opt/miworkplace/miworkplace -data /home/user/.local/share/miworkplace
you need to start the application like this
/opt/miworkplace/miworkplace -data /home/user/.local/share/miworkplace -clearPersistedState