403 Forbidden after update

Hi,

This is a very odd error, but it occurred after updating this plugin to the latest version. When I access the pages of the site, I get a 403 Forbidden error – I can get into wp-admin, but not the site. Has this happened to anyone else? I can’t see any changes to files, other than this plugin, on the server…

Thanks,
Calle

http://wordpress.org/extend/plugins/contact-form-7-to-database-extension/