Once more - all data lost ...
I have rebooted my computer this morning. Opera was opened with three windows, in only one window I used the tabs of my several work areas. In each work area I have from five to around 35 tabs, all important of them as 'fixed/attached tabs' (translated from the German Opera-version I am using without knowing if this are the same names/identifiers in the English version).
In the two other windows I had used other manually opened sites - and I cannot remember which window I had closed last before rebooting.
Now the icons of my 'work areas' on the left vertical side of Opera are still there - but empty.
Long ago I had created an Opera-account, hoping that (like with Firefox) such data would be backed-up there (I still couldn't find a way to safe my 'work areas' for problems like now again) and too that when starting Opera on another computer and logging in with my Opera-account all this settings would transferred to that Browser on another computer. Well - never happened, so I can't see any advantage in logging-in apart from giving data to Opera ...
Does anyone know how to backup the work areas?