Hello sir. It's a great concept, unfortunately it's not working.
I got these errors when I click the "Save Changes" on the setting page:
Warning: Invalid argument supplied for foreach() in /home/mysite/public_html/demo1/wp-content/plugins/jonradio-multiple-themes/includes/admin.php on line 173
Warning: Cannot modify header information - headers already sent by (output started at /home/mysite/public_html/demo1/wp-content/plugins/jonradio-multiple-themes/includes/admin.php:173) in /home/mysite/public_html/demo1/wp-includes/pluggable.php on line 881
Hope it's will be fixed soon.