login problem after changing directory

Hi,
I installed my wordpress under test.example.com and then I changed its directory to example.com. Unfortunatelly i forgot to change site_url and home_url, so example.com redirected to test.example.com. I fixed it by

update_option( 'siteurl', 'http://example.com' );
update_option( 'home', 'http://example.com' );

and everything is fine except fact that I can’t login anymore and images still points to text.example.com
How can I fix my idiocy?
Regards