Completed in 1.6.1

This feature is already implemented, but only appears after buying a Personal ($9.99) or Company ($34.99) license:

If paths are stored in absolute form, you can move the program folder around and everything will work. Storing paths in relative form doesn't have this advantage, and also can't be used if the file is located on other drive.
In your example, paths are clearly unrelated (relative path will be stored as "..\..\APPL-Daten\CintaNotes\cintanotes.db"), so I'd prefer to limit relative path usage to the program folder and its subfolders.

I see. I think the logical thing to here would be to switch to relative paths for db files located in the same folder as cintanotes.exe or in one of its subfolders.
Would that solve the issue for you?

Is cintanotes.settings also in the Dropbox folder?

Hi Chris,
well of course I'll try to implement syncing as generic as I can, so it will become easy to accommodate different APIs, not only SimpleNote and Opera. However this might not be possible in real life) But at least we'll try

Will always keep in mind!