www.domain.com works great but domain.com breaks

Trying to move site to all HTTPS. This plugin seems excellent. Thanks you! We will domain if we get it working fully. Last hang up is that when using a filter of “/” to force all pages to HTTPS, it works for http://www.vistaone.com, but not vistaone.com. Using HTTPWatch, it does the redirect to https://vistaone.com and starts loading elements, but then it starts loading HTTP objects for anything not at the root, (e.g. http://www.vistaone.com/amx/wp-content/themes/VistaOne/style.css) Any suggestions?

https://wordpress.org/plugins/wordpress-https/