How do i get rid of Boingo wifi (mac)?

I installed this Boingo wifi one day at the airport to get internet access. now when i am at home and i turn on my computer it tries to first connect to the internet through boingo. i can’t seem to rid of this program. when i try to trash it a window pops up and says that the program can’t be trashed because it is open. Boingo says that the program stays running in the background. how do i get rid of this stupid program? my computer is a macbook pro. only serious comments please. thankyou.