At the point where you installed SSL the includes/configure.php file would have had to be updated, and this would have involved overwriting the existing online version.

You'd have downloaded the file via FTP, edited it correctly in a plain text editor, and then, before uploading back to the server, you'd have to make the online file 'writeable' by giving it permissions of 644 and then upload the changed file and reset permissions on the online file to 444 or 400 (to make it 'unwriteable' again).

If you haven't done that then it's no wonder that the links which should say https still say http.

Vger