finally I succeded in restoring allmost everything. I installed the last working version 2.6.1 und then every update following it. Then I imported the latest database.

I remember that one of the last actions befor the desaster was storing some fairly large (1000-2000 lettters) chunk of text from a webpage. Is it possible that code from this page corrupted the database?
Feature request: It would be nice if I could sort the database by the remarks field, and that should be included in the sort-dropdown list of the main window.
Why not having an entry under Help: Display latest Readme file.
Keep up the good work. CN is really helpful.
Thanks
Rolf