If I choose Custom URL or Joomla article, the result is the same: the link does not work, and I get a javascript void(0) error. I'm not sure what to do to fix this, so any help is appreciated.

Hi. Are you using the latest version of the extension? Please note that official support for commercial extensions is provided in the Subscriber Help Desk at www.joomlaworks.net/dashboard/helpdesk .
Support requests should ONLY be directed there and require an active subscription plan.
This forum board is to be used for purposes of knowledge exchange ONLY.