This plugin does not work, nothing shows up

I just purchased the pro version, hoping to integrate some custom code inside the fields , i did install it, made a quick list which is displaying all website members ,no matter what user role they have and when i tried adding the shortcode on the front end it shows nothing , just a blank space. i can see that some other users reported that but the developer dont seem to care .. i even contacted this developer via phone email and yet not a single answer provided..