It is not actually your homepage which is displayed in the pop-up window but your web site's error 404 page, indicating that the required page cannot be found.
Either the 'jb-config.php' file is not in the 'wp-juicebox' directory or your WordPress installation is returning an incorrect path for the plugins_url() function. (WP-Juicebox uses the WordPress 'plugins_url()' function to determine the location of the 'jb-config.php' file.)
It looks like there may still be a WordPress configuration option you need to change with regard to your redirection.
Please see the Moving WordPress page for details.
If this does not help, then you could hard-code the path to the 'jb-config.php' file by opening the 'wp-juicebox/wp-juicebox.php' file in a plain text editor and changing line 651 from:
JB.Gallery.configUrl = "<?php echo plugins_url('jb-config.php', __FILE__); ?>";
... to:
JB.Gallery.configUrl = "http://www.hmkphotography.com/blog/wp-content/plugins/wp-juicebox/jb-config.php";
Please note that the line number above refers to the current version of WP-Juicebox (v1.3.1.0).