JJ2: TSF aka 1.24 is a store-bought patch that adds a new character and a new episode. It is not compatible with other versions of JJ2 online. It's not really a patch, it's an add-on. The latest free patch of JJ2 is 1.23. There was speculation of a 1.25 patch that was being made by members of the community. Unfortunately, it's hard to make a patch without help from Epic, and Epic Megagames doesn't care about it's old sidescroller game anymore.