KOrganizer lost data after upgrade

After incremental upgrade 11.4 → 12.1 → 12.2 KOrganizer shows no data. As it seems, user data should be kept under ~/.kde4/share/apps/korganizer/. Any idea how to get data back?

AFAIK you may have to select the relevant database somewhere in the lower left of the screen. It no longer loads your earlier default file automatically.