Get rid of unwelcomed update - Mac

I;m writing this post for the benefit of poor souls like me, who get stuck with this weird thing.

Recently a strange thing showed up on my Macbook Pro (10.8.4): An update for an app called "Itsy" - apparently some type of twitter flavor.

But what the hell is Itsy?  A search on the entire computer revealed nothing.  I couldn't find it and could not get rid of the update suggestion.  Just for the sport I thought to accept the update and see what happens.  This is what happened:

What the ....?

But now I had something I could google.  Sure enough, I got plenty of hits with similar complaints - but none identical.  I was back to square one.  I called Apple support.  After 2-3 days of interaction with senior third tier support who couldn't help, I was able to find somebody at itsyapp.com.  This guy could not help either, but his google yielded better results than mine.  He sent me here and wished me luck.  The instructions in that link did not work for me, but were close enough for me to try something,  So here it goes:

 Open terminal.

su -

As root, changed directory to / (or maybe it was /Volumes/Macintosh HD, I can't remember).

Next:     

     $ find . -name receipt > /tmp/receipt.res

This yielded two results.  

From the command prompt I executed the 'strings' command on each file.

                    $  strings <file name> | less
         

One of the files contained the string Itsy.  BINGO!

It was named "/Applications/Chopper 2/..../receipt".

At this point I simply located "Chopper 2" in the finder and dragged it to trash.

Emptied trash.

Rebooted.

Problem gone.