The overall rating reflects the current state of the app. It accounts for all app reviews but prioritizes the most recent ones.
False advertising! Do not install! What's the point of claiming "free to install" if you force people to pay right after installing? Don't be click baiting when you can simply put the app as PAID.
I'm sorry that you feel this way. The App Store listing does state that there is a charge for doing the configuration of your Google Analytics account, but I will take your feedback and make this more prominent in the app store listing.
We are also planning to add some free functionality to the app shortly.
Again, sorry for your experience and hope next time we can make it more satisfactory for you.