My database is quite large.
Now it's even increasing, as KeeFox stores additional entries. (I didn't find a possibility to update existing entries.)
So I've got the old entry with additional data like "Security question on locked Password", ... including history.
And KeeFox' new entry with with additional data like "URL" and "Form fields".
Is there a way to merge these data without typing it. (at least copy/paste?)
No. Data can only be merged from different databases - sync - not within a database. The biggest obstacle to merging is what do you retain and what do you throw away. I wouldn't like to attempt to make that decision for someone else's data.