[Theme Horse Support Team]

Hi Ted,
It must work. we have just checked the email notification and its ok here.
Yes exactly what ever you customize that will be lost while updating to our new version. If you really want to modify then you may create a child theme and first unhook the functions and then again hook it. So that no customized code will be lost.
for more information
http://codex.wordpress.org/Child_Themes

If you are unable then you may hire a developer to fix the issue.

Thank you!