[Theme Horse Support Team]

HI Rdavis,

You have to update it manually for that login to our site with the same username that you have purchased the theme and you will be redirected to your account page where you can find the available download section.

After downloading .zip file first activate the different theme and delete old version of Attitude Pro from your WordPress Theme directory. (Note: Make sure that you have not customize the code. If you have customized the code then your customize code will be lost. So, Please back-up you old version before deleting it)
After deleting the old version now upload a new version of Attitude Pro theme and activate it.

You can find the version change-log here

Thank you!