Custom stamps not showing in Adobe DC

I have tons of custom stamps I need to have accessible in Adobe DC. I read that they need to be placed in the directory "C:\Users\User Name\AppData\Roaming\Adobe\Acrobat\DC\Stamps", but on all of the installs I have done for this product (7), the directory is not available. The directory I see is "C:\Users\User Name\AppData\Roaming\Adobe\Acrobat\2015\Stamps". I have tried placing the custom stamps in that folder but they are not available in Acrobat. Any help would be greatly appreciated. Thanks!