Thanks for your answer
tray icon doesn't appear with administrator account too.
the solution you give - stopping the service for configuring - is OK
But it is not only a matter of configuration but mainly a question of checking apbackup log. It is not easy to stop the service each time I want to check backup logs. Thats way I have frequently two concurrent Apbackup sessions : service mode, plus normal mode when I am logged.
It works like that but it seems not to be achieved...Perhaps it very complicated to fix this ?