Connectwise Control - spyware?

Just had an SSD installed in my old iMac by a small local company. I get it home and on booting up I notice there's a new item in the menu bar: "Connectwise Control". Obviously I've googled it and it seems to me that it allows a third party to monitor my usage. I don't like to think the worst of people but I'm a bit annoyed that A. it's there at all, and B. that they chose not to mention it. I found the Connectwise app inside an invisible folder and so have moved that to the trash after re-booting in safe mode. After further googling it seems uninstalling it involves using the Terminal, which I'm not comfortable with. Yes, I know I could have complained, but I don't want them to know I'm onto them, yet. Am I being paranoid? And does anyone have any suggestions as to how I can totally expunge this from my machine? Might they have installed other stuff I haven't found?