Right click on a replay file -> open with (or just open if there isn't an option to do that) -> select program for list if asked -> click on the browse button -> browse to your toribash folder and use the tb file -> check the "always use the selected program with this kind of file" -> press ok
Or, an easier way to do this, is to rename your Toribash folder (which has the version number in it) to the name it had before the update.