Metalogix Expert for site

I'm trying to use Metalogix Expert and this is my first time.
I can't get it to connect to my site. I can get it to scan any other site, but it doesn't connect to the website for some reason.
Is that how it's supposed to work? Do I need to install this software on the "Farm" itself? The Instructions say I don't. Please let me know as this is the first stage of the Quests SharePoint software evaluation.
Thank You!