[11.4 kde Version 4.6.00 (4.6.0) "release 6"] kaddressbook won't launch anymore

Greetings !!

I launched KAddressBook to try import some contacts but now it won’t launch anymore.
Is there a way to set it up as it was the first time ?
Now with akonadi I’m sure of nothing, I really don’t know if there is a file like in Mac OS X to delete to restore the default application “workable”…

Thank you…

I just log off/on and now it worked better but there is error messages telling “no writable/editable resources found, re-configure Kmail first” but my contacts are inserted !