PHP error when accessing my site

I got this error message and Host Gator de activated the theme and I got to my dashboard. Now 1 hour later I cannot access my site or active the customize theme, I get this message:

Warning: require_once(/home3/tomgator/public_html/wp-content/themes/customizr/inc/class-fire-widgets.php): failed to open stream: No such file or directory in /home3/tomgator/public_html/wp-content/themes/customizr/inc/init.php on line 175

Fatal error: require_once(): Failed opening required ‘/home3/tomgator/public_html/wp-content/themes/customizr/inc/class-fire-widgets.php’ (include_path=’.:/opt/php54/lib/php’) in /home3/tomgator/public_html/wp-content/themes/customizr/inc/init.php on line 175

http://theachievementprocess.com/wp-admin/

on 4/27/15 Your site at http://theachievementprocess.com has been updated automatically to WordPress 4.2.1
I am a low tech guy. Thanks for your help.