accidentally installed Fences 3...but I only want to stay on Fences 2

I thought I was installing an update to Fences 2, but I guess it was an upgrade to Fences 3.  I have a paid subscription to Fences 2...and don't want to pay for the new features in Fences 3.  The problem is that now when I boot, I get a screen saying to I want to subscribe to Fences 3 or start a trial of Fences 3.   I don't want to do either....I just want to stay on Fences 2....,but there's no option to do that.

How do I get rid of Fences 3 and that pop up message?